The Molecular Clock Used to Date the Emergence of the 2009

Multiple Choice

The molecular clock used to date the emergence of the 2009 H1N1 strain would be inaccurate if

A) mutations arose at different rates in different lineages.
B) the most recent common ancestor of the viral strains existed long ago.
C) the most recent common ancestor of the viral strains existed recently.
D) None of the given choices are correct.