Interest rate. Two mutual fund managers, Martha and David, have been discussing whose fund is the top performer. Martha states that investors bought shares in her mutual fund 12 years ago for $26.00, and those shares are now worth $61.00. David states that investors bought shares in his mutual fund 5 years ago for only $3.60, and they are now worth $8.70. Which mutual fund manager had the higher growth rate for the management period? Should this comparison be made over different management periods? Why or why not? Which mutual fund manager has had the highest growth rate for the management period? (Select the best response.) A. David has had the highest growth rate of 7.37% for the management period. B. Martha has had the highest growth rate of 19.30% for the management period. C. David has had the highest growth rate of 19.30% for the management period. D. Martha has had the highest growth rate of 7.37% for the management period