WHEN I REALIZED THAT I WAS WRONG, I APOLOGIZED _________ MY MISTAK...

56. - E 10 BAI TAP TRAC NGHIEM GIOI TU
E 10 BAI TAP TRAC NGHIEM GIOI TU

56. When I realized that I was wrong, I apologized _________ my mistake.

A. to B. at C. on D. for