Choose the best answer.
What is one difference between arthropods and echinoderms?
A) Arthropods have exoskeletons, but echinoderms have endoskeletons.
B) Arthropods have jointed legs, but echinoderms have straight legs.
C) Echinoderms have spiny skin, but arthropods have soft bodies.
D) Arthropods have body segments, but echinoderms only have a skeleton