Context: Read the description of a trait.
Kelsey has a scar on her right elbow.
What information supports the conclusion that Kelsey acquired this trait?
A. Kelsey's scar was caused by an accident. She cut her arm when she fell off her bicycle.
B. Kelsey's sister has a bruise from falling on her elbow.
C. Kelsey's scar is on her right elbow. Her father also has a scar on his right elbow.
Determine the correct option from the provided choices and reply with its corresponding letter.

A