(No calculator) The temperature of the water in a water bottle minutes after removing the bottle from the refrigerator can be modeled by the function T, with a graph that is increasing and concave down. The function is defined as the inverse function of T. Which of the following describes the graph of ?
(A) is increasing and concave up.
(B) is decreasing and concave up.
(C) is increasing and concave down.
(D) is decreasing and concave down.