Which of the following best explains the way that a molecular clock can be used
A: The number of DNA mutations in an organism is measured over time to determine how long it’ll take for a new species to evolve
B: The number of DNA mutations in a species is compared to the number of DNA mutations in another species to determine the relative amount of time each species have been evolving
C: The number of differences in a specific DNA sequence of two species is multiplied by a known mutation rate to determine the years of evolution that separate the two species
D: The number of differences in the DNA sequences of two organisms of the same species is average to determine how many years of evolution have occurred