Which Statement About the Molecular Clock Is True

Multiple Choice

Which statement about the molecular clock is true?

A) It requires monophyletic taxa.
B) It requires calibration with independent data, such as from the fossil record.
C) It requires binomial nomenclature.
D) It can only be used if the species diverged less than about 100 million years ago.
E) It can only be used if the species diverged more than about 20 million years ago.