Which sentence is an example of characterization through action?

a. her nails were rough and ragged, and the holes in the dress she wore had been mended too many times to count.
b. she lacked height, but her steely blue eyes and the sharp angles of her face made her seem intimidating to others.
c. the clenching of her toes inside her shoes was her only movement as she waited for the police officer to appear.
d. she had beautiful red hair that was often pulled back from her face into a tight, functional braid