Question

Scientist, exam, and fossils from three different animals. They determine that all three animals share similar structures and record their observations as follows animal a and animal B have somewhat similar structures, animal and animal see had very similar structures, animal B, an animal C had very similar structures. The scientist use the similarities to determine the order, and which the fossil should appear in the fossil record based on the scientist observation, which order is the most reasonable would it be be a or C or a CB or CBA or a BC