I WILL MARK BRAINLEST PLS
Oki received a statement on her Certificate of Deposit showing that her investment had returned $8,000 over its life. If the Certificate of Deposit pays a simple interest rate of 4% and her initial investment was $ 20,000, how long had the money been invested?

Select one:
a. 130.1 months
b. 10 years
c. 10.8 years
d. 80 months