Let f and g be two differentiable functions defined on an interval I such that `f(x)>=0` and `g(x)<= 0` for all `x in I` and f is strictly decreasing on I while g is strictly increasing on I then (A) the product function fg is strictly increasing on I (B) the product function fg is strictly decreasing on I (C) fog(x) is monotonically increasing on I (D) fog (x) is monotonically decreasing on I<br>A. The product function fg is strictly increasing on I
B. The product function fg is strictly decreasing on I
C. fog (x) is monotonically increasing on I
D. fog (x) is monotonically decreasing onI