Write the next sentence in the following story.

There's a personal trainer in a pink tank top and black athletic shorts standing a gym with many dumbbells, barbells and basketballs behind her. There are also some other gym equipment behind her. she

Select from:
 (a). is talking about how to use the equipment.;
 (b). is talking while standing in front of a row of parallel bars and demonstrating several different steps on how to properly do them.;
 (c). shows how to use another exercise equipment, like a stand up stand up bar.;
 (d). continues to exercise on the barbells and the trainer watches her from the safety of her trainer.;. The answer should be
(a).