Context: Read the description of a trait.
Nicholas has a scar on his left knee.
What information supports the conclusion that Nicholas acquired this trait?
A. Nicholas's scar is on his left knee. His mother also has a scar on her left knee.
B. Nicholas's scar was caused by an accident. He cut his leg when he fell off his skateboard.
C. Nicholas's brother has scars on both of his knees.
Pick the correct answer from the listed options and provide the letter of the selected option.

B