A Bacterium Is Found That Is Resistant to the Antibiotic

Multiple Choice

A bacterium is found that is resistant to the antibiotic gentamicin.The bacterium was isolated in a hospital where patients were routinely given gentamicin for a variety of infections.What was the pressure that selected for this resistant population?

A) Presence of gentamicin in the environment.
B) High mutation rate for the bacterium.
C) Growth situation for the bacterium.
D) Patients not receiving antibiotic provided source of bacteria.
E) Tainted food.