What are the three synapomorphies which allowed the arthropods to evolve to become the most diverse animal phyla?

A. Segmentation, triploblastic tissues, and chaetae
B. Chitin, coelomes, and complex cell types.
C. Triple segmentation (head, thorax, abdomen); an exoskeleton made of chitin; paired and jointed appendages.
D. Segmentation, paired and jointed appendages, and early vertebrate structures.