I think its d because irony means you are meaning the exact opposite of what your saying
Im not really sure sorry but i do need these points!
Answer:
Akiba Drumer asked the others to say the Kaddish for him after he had gone. The others promised that they would, but when the time came, they forgot.
Explanation:
A adjective clause is a is a dependent clause used as an adjective. Most of the time it begins with pronoun for a example which.
So it would most be essential when your "looking at a sentence that starts with a pronoun (most likely in a short story) and it sounds more of a question. It would also be a dependent clause and would function as an adjective as in <span>answering questions</span> for example: Which one?"
Hope this helps!