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.
Mr. Smith is a professor. His car was stolen yesterday.
A. His car was stolen yesterday, he is a professor.
B. Mr. Smith, who his car was stolen yesterday, is a professor.
C. Mr. Smith, who is a professor, his car was stolen yesterday.
D. Mr. Smith, whose car was stolen yesterday, is a professor.
Chọn D