When someone snaps off an answer that means the opposite of what the words say, he is using
(a)sarcasm
(b)simile

That's would be sarcasm. A simile is a comparison between two things using like or as.

The answer is A, sarcasm.

A simile is just a sentence that is comparing, such as "she is like a daisy"
 good luck!

The correct answer is d. 6

Betray, destroy, and obey do not need to be changed to add the suffix -ed, because the "y" at the end of each word is preceded by a vowel  (so  they would be spelled  "betrayed," "destroyed," and "obeyed").

but hurry is different; it has to  be spelled "hurried" because the "y" at the end of "hurry" is preceded by a consonant.