Answer:
D. she
Explanation:
The sentence is missing a subject complement, that is to say, a noun that describes or identifies the subject: "The person with the most raffle tickets". And since the subject complement refers to the subject of the sentence, it should be a noun or a subject pronoun like I, he, she, you, it, we, and they.
Therefore, option B and C can be easily discarded. Option A can be discarded as well because although it may work as a subject pronoun, the sentence talks about "a person" and not about a thing or an animal. Option D, then, it is the correct option because "she" is a subject pronoun.
