Q. If an investment advisor promises to provide you with an annual return of 7%, he's promising to double your money in approximately ______ years; if, however, it actually takes 16 years to double your money, then your annual return would be approximately ______%

A) 5.0; 11.5

B) 4.5; 10.3

C) 11.5; 5.0

D) 10.3; 4.5

Please provide all the steps and equations