Allusion
Allusion is a figure of speech, in which an object or circumstance from unrelated context is referred to covertly or indirectly
I am pretty sure it would be massive because it is an English question. If you are doing a multiple choice question you should see which one fits the best. If could also be positive impact.
If this is fill in the blank:
I have never “been to” Japan
It seems like a cool place! :)
c.it offers a clue to who sponsors the side
I would say the answer is D.
