He / suffer / rare tropical disease / which / cont...

Câu hỏi: He / suffer / rare tropical disease / which / contracted / while / Africa

A. He still suffers from a rare tropical disease which he contracted while he was in Africa.

B. He still suffers from a rare tropical disease which contracted while he was in Africa. 

C. He suffers from a rare tropical disease which was contracted while he is in Africa.

D. He suffers from a rare tropical disease which he contracts while in Africa.