HE / SUFFER / RARE TROPICAL DISEASE / WHICH / CONTRACTED / WHILE /...

37.

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.