What does “they” refer to?

Câu hỏi: What does “they” refer to?

A Robert Ballard and his team

B other visitors to the Titanic shipwreck

C people from the Titanic who are still alive

D pieces of the ship

Câu hỏi trên thuộc đề trắc nghiệm

Reading 4A: I have found the Titanic