单项选择题

She has put on a lot of weight since she was graduated from the college.

A.自从大学毕业以来她挑起了工作的重担。
B.自从大学毕业以来她长胖了许多。
C.因为她大学毕业了,所以挑起了工作的重担。
D.因为她大学毕业了,所以长胖了许多。