Your answer would be A because none of the others make sense, Hope that helps!
A. Decreasing amount of energy needed to start a reaction.
<span>It processes it as ATP and NAPH </span>
<span>The molecular clock has been useful to determine the phylogenetic relationships of species based on the assumption that they cannot be compared to non molecular methods such as comparative anatomy. The molecular clock helps us discover organisms that have a little common traits or features between evolutionary relationships.</span>