An Enzyme Is Active in the Stomach of an Animal

An enzyme is active in the stomach of an animal but quickly loses its activity when it leaves the stomach.This example illustrates that enzymes are

A) specific to the organs in which they are produced.
B) inactivated by movement.
C) sensitive to changes in pH.
D) digested in the small intestine.
E) consumed by the quantities of substrate in the small intestine.