If an Eight-Cell Sea Urchin Embryo Is Bisected Horizontally

If an eight-cell sea urchin embryo is bisected horizontally,

A) both halves develop into normal, but small, larvae.
B) the top cells remain embryonic, while the bottom cells produce an abnormal larva.
C) the top cells remain embryonic, while the bottom cells produce a small, but normal, larva.
D) the bottom cells remain embryonic, while the top cells produce an abnormal larva.
E) the bottom cells remain embryonic, while the top cells produce a small, but normal, larva.