The correct answer is A. The clenching of her toes inside her shoes was her only movement as she waited for the police officer to appear.
Explanation:
In literature, characterization through action occurs when the narrator or author suggests the way a character is or looks through the actions of him or her. This can be seen in "The clenching of her toes inside her shoes was her only movement as she waited for the police officer to appear" because the action of this female character shows of remaining still except by moving her toes suggest this female character is calm or at least wants to pretend it, but still feel nervous which is why she is moving her toes.