Which statement best describes the range of substrates microorganisms can metabolize?

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Microorganisms have a broad enzymatic toolkit and a wide range of metabolic pathways that let them utilize many different carbon and energy sources. Through pathways like glycolysis, the TCA cycle, and various forms of respiration and fermentation, plus enzymes that can act on sugars, amino acids, organic acids, alcohols, aromatic compounds, and even gases or polymers, microbes show remarkable versatility. In real-world settings, they adapt to what’s available, and some can degrade complex or unusual compounds, sometimes even xenobiotics. That breadth is why the statement that they can metabolize virtually any substrate best captures how flexible microbial metabolism can be. The more restrictive options don’t fit because they imply a narrow or exclusive substrate range, which isn’t representative of microbial metabolic capabilities across diverse species and environments.