Main words (like nouns and verbs) are stressed in iambic pentameter. Minor words (like preposition, articles, and conjunctions) are unstressed.
If you are asking about which (a/an) is correct, it is an.
Answer:
"I thought you were both... sixteen"
Explanation:
All of the other options explain reasons why Cherry and Marcia would talk to Ponyboy and Johnny except for that one.
