Choose the corrects sentence .
AHe used to smoke , but now he's stopped.
BHe was used to smoke , but now he's stopped.
CHe is used to smoke , but now he's stopped.
DHe used to smoking , but now he's stopped.
AHe used to smoke , but now he's stopped.
BHe was used to smoke , but now he's stopped.
CHe is used to smoke , but now he's stopped.
DHe used to smoking , but now he's stopped.