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Molecular clocks

Atake advantage of the fact that only neutral mutations do not happen at a steady rate.
Btake advantage of the fact that all mutations affect the fitness of an organism.
Ctake advantage of known mutation rates to estimate how long ago organisms shared a common ancestor.
Dtake advantage of the fact that all mutations happen at a steady rate.

Verified Answer :

Dtake advantage of known mutation rates to estimate how long ago organisms shared a common ancestor.  Molecular biologists know that for millions of years, there is mutation build-up in any stretch of DNA at a reliable rate of occurrence. This allows them to estimate the common ancestor that each lineage have descended from.

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