Which one of the following statements with regard to embryonic development in humans is correct?
A. In the second cleavage divison one of the two blastomers usually divides a little sooner than the other.
B. Cleavage divison bring about considerable increase in the mass of protoplasm.
C. With more cleavage divisions the resultant blastomeres become larger and larger.
D. Cleavage division results in a hollow ball of cells called morula.
