The answer is E. Please help.

Bruce deposits 100 into a bank account. His account is credited interest at an annual effective interest rate of i. At the same time, Peter deposits 100 into a separate account. Peter's account is credited interest at a force of interest of 8. After 7.25 years, the value of each account is 200. Calculate (i-8). A 0.12% B 0.23% 0.31% 0.39% E 0.47%