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

There's a man demonstrating archery skills in an indoor gym. he

Available choices:
 a). is using a large bow to train for archery.
 b). is shown by a lady sitting in a chair and posing.
 c). is interviewing another man about night skies during a session.
 d). begins by picking up the bow and arrow to show how to correctly hold and position the arrow.
d).