Charles Darwin Inferred the Pattern of Common Ancestry Without Understanding

Charles Darwin inferred the pattern of common ancestry without understanding the basis for heredity. However, if Darwin's theory of descent with modification is correct, then

A) DNA sequence similarity should reflect patterns of common ancestry inferred from other evidence.
B) DNA sequences will indicate the correct phylogeny, and other traits, such as morphology and anatomy, will be irrelevant to common ancestry.
C) the hereditary basis of a trait will not matter for understanding its evolutionary history.
D) common ancestry will be reflected in phylogenies only for traits that are determined by a single gene.

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