For which reason would writers most likely choose to write satire?
a. their ideas are in conflict with a common cultural value.
b. they enjoy the challenge of writing symbolically.
c. they have sarcastic personalities.
d. their ideas reflect the accepted social ideals of their day.

a.their ideas are in conflict with a common cultural value.

Satires are often used for authors to poke fun at or illustrate the ridiculousness they feel is in society. By using satire, authors are indirectly attacking what people regard as respected cultural values without directly going up against society. While satirical writers may also have the qualities of B and C, these are not true of all satirical writers and not why they choose to write satires. Option D is just wrong.

to give the reader a sense of the chaos, fear, and havoc taking place

in june, we will have been married for eighteen months. (i am assuming this is what you want? the sentence, as you have presented it, is grammatically incorrect--   you want it corrected, yes? )