Answer:
The answer is option B.
Step-by-step explanation:
Option A can't work because "," is not something you put at the end of a question or sentence.
Option C can't work because it is a question and there is a period instead of a question mark.
Option D can't work either because there's no punctuation at the end.
Option B works because there is proper punctuation at the end of the question, the question mark "?"