Both Flatworms and Arthropods Inhabit a Variety of Environments,yet Flatworms

Multiple Choice

Both flatworms and arthropods inhabit a variety of environments,yet flatworms are unable to fly.What theme best describes this limitation?

A) The coelomate arthropods are more flexible and have space for complex flight organs.
B) The cuticle of an arthropod supports flight muscles.
C) Ancestral traits limit the architecture of the flatworm.
D) Ancestral traits limit the architecture of the arthropoD.