The Following Questions Are Based on the Description Below

The following questions are based on the description below.
A student encounters an animal embryo at the eight-cell stage. The four smaller cells that comprise one hemisphere of the embryo seem to be rotated 45 degrees and lie in the grooves between larger, underlying cells (spiral cleavage) .
-What kind of data should probably have the greatest impact on animal taxonomy in the coming decades?

A) fossil evidence
B) comparative morphology of living species
C) nucleotide sequences of homologous genes
D) similarities in metabolic pathways
E) the number and size of chromosomes within nuclei