GIVING BRAINLIEST TO CORRECT ANSWER Which key correctly represents the information below?

A.12 | 1 = 12
B.12 | 1 = 13
C.12 | 1 = 122
D.12 | 1 = 121

Dakota earned $7.50 in interest in account a and $18.75 in interest in account b after 15 months. if the simple interest rate is 4% for account a and 5% for account b, which account has the greater principal? explain. to make it a little easier, there is an image. good luck!