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.
Main clause <span> can stand alone as a sentence .</span>
The answer is C. If the reader uses “I” he’s specking about himself.
Answer:
I am unable to see the sentences.
