What happens next in this paragraph?

A man demonstrates how to walk across and navigate a slackline in a grass courtyard in front of apartments. the man
OPT:
a). demonstrates how to traverse a low brick fence on a residential street.
b). walks slowly across the slackline while talking and stopping to talk to passerbys.
c). stands on a slackline balancing himself with his arms before the clip cuts to him interviewing.
d). poles backward, glasses on and he begins to walk while holding the slackline while walking across the courtyard.
c).