—— Why did he let you repeat his instruction time and time again?
—— ＿＿＿＿＿＿that I remember what was＿＿＿＿＿after he went out.

A．To see to it；to be done	B．Making sure； to be done
C．To make sure；to do	D．Seeing to； done