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

A