Part A: D.
Meaning of allusion:allusion refers to something that is in both reality and fiction. for example, a book mentions Mona Lisa. it is an allusion because it's referring to something that is in reality in a book.
Part B: A
I think the error is "is going to," to be replaced with will.
"The Committee will give their vote on Tuesday."
Answer:
Number 4 should be "should"
Number 5 should be "had better"
Other than that your answers are correct.
I don’t understand can you explain a little bit more ?