Which Observation Led Darwin to Propose That the Glyptodont Is

Multiple Choice

Which observation led Darwin to propose that the glyptodont is related to the armadillo?

A) Both species lived in the same region at the same time.
B) Both species went extinct at the same time.
C) Both species are adapted for marine life.
D) Both species have helmets, bony shells, and unusual bony plates.
E) Each species are found in different regions of the world.