Explain how mistaken identity becomes even more complicated in act iii scene iv of twelfth night (include and example)

Situation:

Antonio thought he was speaking with Sebastian. However, he was not. He was in fact speaking with Viola, who could disguise as a man and because Viola and Sebastian are siblings, they have a strong physical likeness. Thus, Antonio mistook Viola for Sebastian.

Example:

This is a common practice among twins all over the world. They can distinguish their physical differences while others cannot. You surely have heard about siblings being confused with each other by other people, even when their physical likeness is not very obvious like the one in twins.

In act III, scene IV, mistaken identity becomes more complicated when Sir Andrew Aguecheek challenges Cesario (who is really Viola) to a duel. Viola is ready to admit that she is too weak to fight but eventually has to face Sir Andrew. This plot twist highlights how Viola’s decision to dress as a man has some potentially dangerous consequences. However, Antonio suddenly appears on the scene and, thinking that Viola is Sebastian, comes to the aid of the person he thinks is his friend.

No one is able to understand how Cesario happens to be Antonio’s friend. When police officers intervene and recognize Antonio as a wanted man in Illyria, Antonio gives his reasons for fighting. He explains that that he is trying to save the young man he once saved from drowning:

ANTONIO: Let me speak a little. This youth that you see here

I snatched one half out of the jaws of death,

Relieved him with such sanctity of love,—

And to his image, which methought did promise

Most venerable worth, did I devotion.

Antonio then asks Cesario/Viola to give him back his purse, which he lent earlier to Sebastian. She has no idea what he is talking about, of course, but Antonio, still mistaking Viola as Sebastian, thinks Sebastian is betraying him.

The characters in the scene are befuddled and unable to comprehend these happenings. But Viola understands that this case of mistaken identity hints at the fact that her brother Sebastian is alive and has been in the company of Antonio in Illyria:

VIOLA: Methinks his words do from such passion fly

That he believes himself; so do not I.

Prove true, imagination; O prove true,

That I, dear brother, be now ta'en for you!

1. read the following excerpt from franklin d. roosevelt's "fireside chat 19":

on the other side of the picture, we must learn also to know that guerilla warfare against the germans in, let us say serbia or norway, us; that a successful russian offensive against the germans us; and that british successes on land or sea in any part of the world strengthen our hands.

remember always that germany and italy, regardless of any formal declaration of war, consider themselves at war with the united states at this moment just as much as they consider themselves at war with britain or russia. and germany puts all the other republics of the americas into the same category of enemies. the people of our sister republics of this hemisphere can be honored by that fact.  

the true goal we seek is far above and beyond the ugly field of battle. when we resort to force, as now we must, we are determined that this force shall be directed toward ultimate good as well as against immediate evil. we americans are not destroyers — we are builders.

analyze the effectiveness of this excerpt. how does it function within the speech as a whole? how does the structure of the excerpt to convey the speech's purpose and key points? support your argument with evidence from the speech. (10 points)

i would think its c but i'm not sure