Question

HELP me CHECK. In general, more complex animals are
A) more likely to rely on chemical digestion than to rely on mechanical digestion.

B) more likely to perform intracellular digestion than extracellular digestion.

C) more likely to have one body opening that to have two body openings.

D) more likely to have a digestive tract than to have a gastrovascular cavity.

I say D, but tell me what you think.