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

A helicopter is seen driving over an ocean where people are seen surfing. several shots

Pick from: a). are shown of people riding along the water and others sitting.; b). are shown of divers swimming and throwing around such objects as fish and squid.; c). are shown of people surfing along the water and over waterfalls.; d). are shown of people surfing as well as walking around and watching as well as people on the beach.;
a).