Context: This picture shows a fossil of an ancient animal called Canis dirus.
Canis dirus went extinct over 10,000 years ago. Fossils of Canis dirus have been found in North and South America.
Which trait did Canis dirus have? Select the trait you can observe on the fossil.
A. horns
B. four legs
C. dark-brown fur
Determine the correct option from the provided choices and reply with its corresponding letter.

B