Identify the one underlined word or phrase....

Câu hỏi: Identify the one underlined word or phrase. A, B, C or D - that must be changed for the sentence to be correct. JKL Motorbikes sells (A) six different models, the first which (B) they started (C) making (D) in 1985.

A. Sells

B. Which

C. Started

D. making