If the Temperature of an Enzyme-Catalyzed Reaction Is Increased from 40°C

If the temperature of an enzyme-catalyzed reaction is increased from 40°C to 70°C, the rate of the reaction

A) will increase indefinitely.
B) will decrease immediately.
C) will decrease to zero because the enzyme denatures.
D) will decrease and then increase.
E) cannot be determined without information regarding optimal temperature.