What happens next?

A man and woman are scuba diving in the ocean. The guide is helping the woman swim through the water. she

pick from the following.
[a]. is exploring the bottom of the sea, looking at plants and fish.;
[b]. is exhaling through her nose and blowing her breath out.;
[c]. stops the scuba diver and picks him up out of the water.;
[d]. grabs a fish out of the water and holds it.;
[a].