The buses began to pull out. Most of them were ful...

Câu hỏi: The buses began to pull out. Most of them were full passengers.

A The passengers, most of them were full of, began to pull out the buses.

B The passengers, most of whom were full of the buses, began to pull out.

C The buses, most of them were full of passengers, began to pull out.

D The buses, most of which were full of passengers, began to pull out.