Multi-select problem: How does the next paragraph end?

A man wearing ski goggles adjusts the camera. Several people are seen skiing down a steep slope. they

OPT:
a). continue skiing down the hill holding tubes and performing flamingos.
b). continue skiing faster and faster as they go downhill.
c). keep going down the steep mountain slope.
d). go over several flat hills trying to stay upright.
b).