Short words (usually less than 5 letters) like an, a, and, ect. You can also capitalize everything in the title if you are unsure.
Answer:
C. They both use expressions to depict tone.
D. They both show a warm and playful mood.
Sentence B Whom will drive me to the party is wrong since whom is mistaken for who. Sentence C.She is theone whom will be throwing the party <span> </span><span>as well should use who instead of whom in the sentence. This also applies for sentence D. who is a subject pronoun which asks for the person who does the action while whom is used as an object pronoun. Correct answer is A.</span>