the daily recommended sllowance of vitamin c for sixth grader isc45mg 1 orange has about 75%. how many mg are in 1 orange​

Describe the end behavior of the function below. f(x)=(2/3)^x-2 a. as x increases, f(x) approaches infinity. b. as x decreases, f(x) approaches 2. c. as x increases, f(x) approaches -2. d. as x decreases, f(x) approaches negative infinity.