One safe investment pays 7% per year, and a more risky investment pays 9% per year. a. How much must be invested in each account if an investor of $96,000 would like a return of $7,240 per year? b. Why might the investor use two accounts rather than put all the money in the 9% investment? a. is invested in the 7% account. + is invested in the 9% account. b. Why might the investor use two accounts? OA. Investing in two accounts always yields more money than investing in just one account. OB. Although the 9% account earns more interest, the 7% account has no hidden fees. OC. The 9% investment is riskier than the 7% investment. There is a greater chance the investor will lose money if it is all placed in the 95 OD. The 9% account does not earn as much interest as the 7% account