Marsupials Differ from Eutherians in That

Marsupials differ from eutherians in that

A) marsupials do not have a placenta, whereas eutherians do.
B) some marsupial species can glide but none can fly, whereas some eutherian species can fly.
C) there are more species of marsupials than there are of eutherians.
D) the marsupials are more widespread than eutherians are.
E) marsupials are more developed at birth than eutherians are.