Answer:
The answer is c I think sorry if it is wrong
The activity of an Enzyme is affected by its environmental
conditions. Changing these alter the rate of reaction caused
by the enzyme. In nature organisms adjust the conditions of their
enzymes to produce an Optimum rate of reaction where necessary
or they may have enzymes which are adapted to function well in
extreme conditions where they live.
Other reasons are
Not finishing the antibiotics.
Or
Taking antibiotics too often
The answer will be C decreases
It’s called a slump
Hope this helps :)