The burglar was trying to break into the shop. He was caught by the night guard when doing so.

A. By the time the night guard caught him, the burglar had broken into the shop.

B. Having tried to break into the shop, the burglar was caught by the night guard.

C. While trying to break into the shop, the burglar was caught by the night guard.

D. Having seen the burglar breaking into the shop, the night guard caught him.