<span>The sentence which uses negatives correctly is:
A.We didn't even realize that today is Saturday.
In this sentence, only one negative word is used: not. Sometimes the use of double negatives such as the in the remaining choices above are used in literary pieces but they are grammatically incorrect.</span>
I would say A because it is saying how something feels
Annus Mirabilis - John Dryden
Second Treatise on Government - John Locke
Leviathan - Thomas Hobbes
A Dictionary of the English Language - Samuel Johnson
I think the answer is B contrast because a foil character usually contrasts with another character like the protagonist.