Identify the parallel structure used in this passage. what effect does this use of parallel structure have on kings statement

Parallel or parallelism, means using the same pattern of words to show that two or more words or ideas are of equal importance. Words and phrases should match in structure and tense. It is used to clarify writings and make them easier to understand. This can be used with different structures including infinitives, words, clauses and lists.  

In parallel structure, sentences have a series of phrases or clauses, which start and end in almost a similar fashion, by keeping the rhythm of the lines.

Example: Many people like riding, hiking, biking, and swimming

the price of our current war is high; it costs money and it costs lives.

but it does not cost our pride. it does not cost the guilt that would arise from knowing that we did nothing to intervene while our neighboring nations fell to despotic leaders.

it does not cost the terror of knowing that our allies are unstable. it does not cost the fear that we, too, will be next to fall.

which sentence most accurately explains why the speaker's use of the parallel structure is effective in this passage?

a. it underscores that disagreement will not be tolerated and will be dealt with swiftly.

b. it makes the speaker seem like a decisive and capable leader.

c. it emphasizes reasons to fight and inspires listeners to aid the war effort.

d. it establishes the speaker's credibility by acknowledging the difficulties of war.

- "the answers are a and b.  

when cullen speaks of planting while others reap, and standing "abject and mute," he is speaking about the racial injustices present in american society. as these injustices have changed over time, the american identity  has also shifted. those changes are, in turn, reflected in american literature."