Which of the following is a general mechanism of antimicrobial resistance?

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Efflux pumps actively remove antimicrobial agents from the cell, lowering the intracellular drug concentration so the organism can grow despite the presence of the antibiotic. This mechanism is broad because many pump systems can export multiple, structurally diverse drugs, leading to cross-resistance to different antibiotic classes. Pumps are powered by the proton motive force or ATP and can be intrinsic or acquired, and they appear across many bacteria. While drug inactivation, decreased permeability, and bypassing the drug target are also resistance strategies, efflux pumps represent a general, widely applicable means by which microbes diminish the drug’s effect.