The Use of Antibiotics by Humans Can Sometimes Result in an Opportunistic

The use of antibiotics by humans can sometimes result in an opportunistic infection because

A) antibiotics inhibit immune cells, leaving the immune system in a weakened state.
B) antibiotics do not distinguish between 'good' and 'bad' bacteria.
C) some bacteria become resistant to antibiotics.
D) opportunistic pathogens have a symbiotic relationship with the primary pathogen.
E) antibiotics depress cellular energy production in some bacteria and so allow the rapid growth of other bacteria.