What kind of molecular information is commonly used to study phylogeny among species that diverged from a common ancestor relatively long ago?

A)Whole genomes because they are easy to obtain.
B)Segments of cellular membrane proteins because the proteins,coded by DNA,are found in all living organisms.
C)The mitochondrial genome because it easily incurs neutral mutations.
D)Small ribosomal subunit (SSU)RNA because it is found in the genomes of all living organisms.
E)DNA sequences within introns because their sequences change rapidly over evolutionary timE.