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

Cheerleaders are standing on a blue mat. They start doing a routine on the mat. They hold up signs in the air. they

Available choices:
(a). finish their routine and wave at the audience.;
(b). throw frisbees.;
(c). begin to dance and do martial arts routine.;
(d). shake hands and hug.;
(a).