20. Let g be a twice-differentiable, increasing function of t. If g(0) 20 and g(10) 220, which of the following must be true on the interval 0 < 10 ? (A)
O g'(t) 0 for some t in the interval.
O g) 20 for some t in the interval. (C)
O g"(t) 0 for some t in the interval. (D)
O g"(t) > 0 for all t in the interval
