Which of the following describes the correct sequence of stages during embryogenesis?
A) Cleavage, blastula formation, gastrulation
B) Cleavage, gastrulation, blastula formation
C) Blastula formation, gastrulation, cleavage
D) Blastula formation, cleavage, gastrulation
E) Gastrulation, cleavage, blastula formation
Answer: A