The balance in a savings account is modeled by the exponential function f(x) = 5000(1.02) where x is the number of years since the initial deposit. Interpret the constants a = 5000 and b = 1.02. (1 point)

A: The balance grows by b - 1 = 0.02 = 2% each year until it reaches a, $5,000.

B: The initial balance, a, is $5,000 and grows by b = 1.02% each year.

C: The balance grows by b = 1.02% each year until it reaches a, $5,000

D: The initial balance, a, is $5,000 and grows by b - 1 = 0.02 = 2% each year.