单项选择题

Boss: Would you mind working morning shift next month
Ella: Oh, I just hate getting up early. I know I"ll come in late.
Boss: Yes, I do remember now. Last year, you were always late in the mornings.
Ella: ______
Boss: The problem is I"m really shorthanded now.
Ella: Could you ask somebody else

A.I"m sorry I always forgot to do something.
B.I have to work second shift next year.
C.But you will have to pay for the extra salary.
D.That"s why I switched to the afternoon shift.