When microbial control methods are used, microbes are destroyed at a constant rate; there is no instantaneous death of all the microbes present. That microbial death rate is influenced by all of the following factors except .
a. the number of microbes
b. the microbial characteristics
c. the time of exposure
d. toxins produced by the microbe

D. TOXINS PRODUCED BY THE MICROBE

Explanation:

Microbial control methods are methods that are used to inhibit or the growth or destroy microbes.

These control methods are categorized into two; PHYSICAL and CHEMICAL methods.

For effective control of microbes, several factors are to be considered viz size or number of the microbes, the characteristics of the microbes as different methods or agents works on different microbes.

Other factors include; concentration of dose and time phrase of treatment.

The toxins released by the microbes is not a factor to be considered in control methods but safety of the worker must be taken in consideration.

This is so because the effects of the agents used can be more fatal than the microbes themselves.

i think the answer would be d