HELP I NEED HELP ASAP

The function f(t)=1,500,000(0.885)^t models the population of a small country after t years. Which statement is true?

A. The population is growing at a rate of 88.5%
B. The population is declining at a rate of 11.5%
C. The population is declining at a rate of 88.5%
D. The population is growing at a rate of 11.5%