The main reason why antibiotics could not always treat the bacteria-mediated diseases is

Options

A. insensitivity of the individual following prolonged exposure to anitbiotics
B. inactivation of antibiotics by bacterial enzymes
C. decreases efficiency of immune system
D. the development of mutant bacterial strains resistant to antibiotics.

Answer

D

Explanation

In response to antibiotics, bacteria develop mutant strains that become resistant to these antibiotics. Thus these antibiotics become incapable against bacterial mediated diseases.