Exponential function f is represented by the table.
function g is an exponential function passing through the points (0, 15) (2, 0)
which statement correctly compares the behavior of the two function on the interval (0, 2)

A. both functions are positive on the interval but one function is increasing while the other is decreasing
B. both functions are positive and increasing on the interval
C. both functions are positive and decreasing on the interval
D. one function is positive on the interval while the other is negative