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

Two people are working out on exercise bikes. The one wearing a blue wig puts their hands in the air. people


 a). are in front of them also on exercise bikes..
 b). are standing next to the bike shop talking..
 c). are crossing lanes in the street on bicycles..
 d). are standing in a room behind a bar talking to the camera..
a).