Choose the change that is required in the punctuation of the underlined part of the sentence. If no change is needed, select "Leave it as is."

One final hammer blow, and the chisel bit a large hole in the sealed door.

Harry Carter held up a candle and peered cautiously in.

A) Omit comma (,).
B) Replace comma (,) with semicolon (; ).
C) Replace comma (,) with period (.).
D) Leave it as is.