Disparaged
dynamic
effrontery
dexterous
efficacious

1. Efficacious

2. Dexterous

3. Dynamic

4. Effortenry

5. Disparaged

Explanation:

1. We had hoped that someone would discover an efficacious treatment of AIDS.

Efficacious means effective in producing a desired result.

2. The architect was very dexterous and could build even the most complicated models.

Dexterous means showing skills especially with the hands.

3. The aspiring actress was extremely dynamic in her performance in New York; the audience gave her a standing ovation.

Dynamic means full of energy and positive in attitude.

4. I was shocked that Nadia had the effortenry to ask for a favor immediately after she had insulted me.

Effortenry means extreme rudeness or a behavior that is not acceptable to others.

5. The opponents disparaged one another, each one attacking each other's character.

Disparage means regarding someone or something to be of little worth.

c. is the answer to your question.

explanation:

1. this would be first person. it would be like "i walked home from school today" they are the narrator of the story and is a character as well.

2. first person because they used the word "i" in the quote.

3. i'm really not sure about this one i'm really sorry i never read it so i wouldn't know how to answer it. 

4. it would be character vs. society because everyone he meets there is always a conflict of some sort because he's stuck in his daydream.

5. it would be sadness at the loss of youth because the title itself tells us it's about age so it couldn't be about regret. and the tone just sounds sad, not angry. 

i hope this !