Which sentence contains an underlined clause? (the uppercase parts are where the underlined parts were)

A)My TWO LARGE DOGS HAPPILY chased each other around the backyard
B) Because of their size, my dogs must be FED THREE MEALS DAILY.
C) I wash my dogs OUTSIDE NEAR the garage once every two weeks
D) after walking my dogs, I SAT DOWN to do my homework assignment.


Pls help :)