The Two Most Common Ways Drug Resistant Bacteria May Develop

The two most common ways drug resistant bacteria may develop in a person taking an antimicrobial drug are :

A) the bacteria acquire an R-plasmid during this period of time and some of the bacteria developed a resistance mutation.
B) the bacteria acquire an R-plasmid during this period of time and the person may be immunocompromised.
C) some of the bacteria develop a resistance mutation and the person may be immunocompromised.
D) the person may be immunocompromised and the person did not properly take the antimicrobial drug.
E) the person did not properly take the antimicrobial drug and some of the bacteria developed a resistance mutation.