Take another look at the passage:
When Will stepped out of the shower, he panicked.
Realizing that all of his underwear was still in the washing machine. Damp
jockey shorts were not a good way to start his day.
You chose the first part, When Will stepped out
of the shower, he panicked. This part has a
he is the subject;
panicked is the
verb. A fragment will not have
a main clause.
Go back to the passage to try again.