Most DNA-Based Phylogenetic Analyses Place Humans and Chimpanzees (Including Bonobos)as

Most DNA-based phylogenetic analyses place humans and chimpanzees (including bonobos) as each other's closest relatives,but a persistent minority of studies place gorillas and chimpanzees as sharing a common ancestor that was not a human ancestor.The reason is incomplete lineage sorting,which simply means that ________.

A) the ancestral species of all great apes was genetically variable at some loci, and each descendant species lost different random combinations of ancestral alleles
B) the labs that sequenced great ape DNA made a simple procedural error
C) mitochondrial genes can become unlinked and be inherited by independent assortment
D) primate lineages are not completely reproductively isolated and can hybridize
E) coding regions of the primate genome are more likely to give false results than noncoding regions such as SINEs