Interest rate. Two mutual fund managers, Martha and David, have been discussing whose fund is the top performer. Martha states that investors bought share her mutual fund $10$ years ago for $$24\mathrm{.}00,$ and those shares are now worth $$65\mathrm{.}00.$ David states that investors bought shares in his mutual fund $6$ years ago for $0$ $$2\mathrm{.}70,$ and they are now worth $$8\mathrm{.}30.$ Which mutual fund manager had the higher growth rate for the management period? Should this comparison be made ove different management periods? Why or why not?

A$.$ David has had the highest growth rate of $20\mathrm{.}58\%$ for the management period.

B$.$ Martha has had the highest growth rate of $20\mathrm{.}58\%$ for the management period.

C$.$ David has had the highest growth rate of $10\mathrm{.}48\%$ for the management period.

D$.$ Martha has had the highest growth rate of $10\mathrm{.}48\%$ for the management period.

Which of the following statement is true? $($Select the best response.$)$

A$.$ A valid comparison can only be made over different management period due to tax considerations.

B$.$ A valid comparison can only be made over different management period due to changing market conditions.

C$.$ A valid comparison can only be made over the same management period due to changing market conditions.

D$.$ A valid comparison can only be made over the same management period due to tax considerations.