Context: This picture shows a fossil of an ancient animal called Priscacara.
In some places, large numbers of Priscacara fossils have been found near each other. This suggests that Priscacara lived in groups.
Which trait did Priscacara have? Select the trait you can observe on the fossil.
A. a long fin along its back
B. a mostly silver body
Choose the right answer from the options and respond with its letter.

A