Let T(h)be the Temperature in Degrees Celsius at a Height

Multiple Choice

Let t(h) be the temperature in degrees Celsius at a height h (in meters) above the surface of the earth.What does t '(1200) mean in practical terms?

A) The temperature in degrees Celsius at a height 1200 meters above the surface of the earth.
B) The height above the surface of the earth at which the temperature is 1200 degrees Celsius.
C) The rate of change of temperature with respect to height at 1200 meters above the surface of the earth (in degrees per meter) .
D) The rate of change of height with respect to temperature when the temperature is 1200 degrees Celsius (in meters per degree) .