How Are the Vast Majority of Proteins Expressed Early in an Animal's

How are the vast majority of proteins expressed early in an animal's development?

A) They are translated from preexisting mRNAs present in the unfertilized egg.
B) They are translated from preexisting mRNAs delivered by the sperm that fertilized an egg.
C) They are transcribed and translated from the unfertilized egg's DNA post-fertilization.
D) They are translated from mRNAs that were transcribed from the zygote's DNA in the first three rounds of cell division.