Today, Bravo has $6000 in her account. She expects to have $12000 in her account in 6 years. The annual interest rate that Bravo expects to earn over the next 6 years is the same as the annual interest rate she has earned since she made her initial and only deposit. How many years ago did Bravo make her initial investment if it was $600? O A 21.9 O B. Answer is not listed or is not possible O c. 20.9 OD. 19.9 O E. 25.9