Answer:
The answer is D.
Explanation:
A. Wouldn't work because the sentence has no punctuation in the middle of the sentence where it should be.
B. Works because it has punctuation in the correct spots, and it has the correct order.
C. Wouldn't work because it has no punctuation in the middle of the sentence. It would work if there was a comma in front of the 'and', but there isn't. If that was a typo, then C would be your answer.
D. Wouldn't work because now instead of one sentence, it is two sentences. But, if this was a multiple choice question, then this would most likely be one of them.