How Does Resistance to Drugs Spread in Bacterial Populations

Multiple Choice

How does resistance to drugs spread in bacterial populations?

A) Horizontal gene transfer between bacteria spreads R (resistance) plasmids.
B) Exposure to drugs causes mutations in bacterial genes.
C) The formation of biofilms protects bacteria from the effects of drugs.
D) Exposure to drugs alters gene expression in bacteria.
E) Both horizontal gene transfer and the growth of biofilms spread drug resistance.