Context: This picture shows a fossil of an animal called Holophagus. Holophagus lived in the ocean and gave birth to live young.
Which trait did Holophagus have? Select the trait you can observe on the fossil.
A. long legs
B. two fins on its back
C. a large red lump on its head
Select the correct answer from the given choices and respond with the letter of the chosen option.

B