Multi-choice problem: Continue writing the next sentence in this paragraph:

A red mustang is being hosed down. Next, the workers rub soap over the car. after that

Choose your answer from:
a). , a green bucket is removed and caulk is placed into place.
b). , the man washes around the car.
c). , they both work on washing the soap off before applying another soap over the vehicle.
d). , shots are shown of rioters dancing around and cleaning the windows.
c).