Which sentence is an example of characterization through action?

A. Her front tooth was slightly chipped, making her smile all the more beautiful for its imperfection.
B. She closed the door softly, her fingers shaking as she turned the key and bolted the lock.
C. Her blue eyes were clouded by age; the wrinkles around the edges had become deeper with each passing year.
D. She was tall, with short-cropped blond hair that was at odds with the length of her face.