Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.
The student next to me kept chewing gum. That bothered me a lot.
A. The student next to me kept chewing gum, that bothered me a lot.
B. The student next to me kept chewing gum, bothered me a lot.
C. The student next to me kept chewing gum, which bothered me a lot.
D. The student next to me kept chewing gum, bothering me a lot.