Answer:
IT'S A.
Explanation: Because an appositive phrase is a noun or noun phrase that renames the noun next to it. And A. is the one that explains about it.
C if that’s wrong I don’t know :)
Answer:
Upset
Explanation:
He’s feeling upset that he was possibly left out of something, got pranked/cheated on, etc. Whatever happened was so bad that he thought they might be joking