Are there answer we could pick from?
I also agree that the answer is B: whom
in this sentence you are using the preposition + whom grammar structure. Whom is considered an object pronoun and is used when asking who will receive the action, which in this case, I believe is, baking those cookies. Hopefully this makes sense and good luck.
The verb "will attend" is in future tense
HE CHEATED ON HIMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM
One benefit is that the audience can connect more effectively with the author if they are tellinga story in first-person pov because the authir would have to use language that helps the audience feels and almost in a way experience what they went through or are describing.