Exponential function f is represented by the table.
x 0 1 2 3 4
f(x) 868 292 148 112 103

Function g is an exponential function passing through the points (0,800) and (4,0).
Which statement correctly compares the two functions?
A.
Both functions are decreasing on [0, 4], but function f decreases at a faster rate.
B.
Both functions are decreasing on [0, 4], but function g decreases at a faster rate.
C.
Only function f is decreasing on [0, 4], and both functions are positive on that interval.
D.
Only function g is decreasing on [0, 4], and only function f is positive on that interval.