Which statement is true about the function f f is decreasing over the intervals A f is decreasing over the intervals 2≤x≤3 and 6≤x≤7 B f is increasing over the intervals −2≤x≤0 and 7≤x≤9 C f is negative and decreasing over the interval 1≤x≤7
f D is positive and decreasing over the interval 0≤x≤1.