What Feature Distinguishes an Embryo from a Zygote

Multiple Choice

What feature distinguishes an embryo from a zygote?

A) An embyro's cells are diploid, whereas a zygote's cells are haploid.
B) A zygote consists of a single cell, whereas an embryo is multicellular.
C) An embryo has not differentiated to the extent that rudimentary organs are present, whereas a zygote's cells have differentiated significantly.
D) A zygote is generally much larger than an embryo.