The correct answer is C. Facultative bacteria survive in both the presence and absence of oxygen. They are able to switch between aerobic respiration and anaerobic respiration depending on the availability of oxygen. Aerobic respiration is a more efficient process that produces more energy, but it requires oxygen. Anaerobic respiration is a less efficient process that produces less energy, but it does not require oxygen. Facultative bacteria are able to survive in a wide range of environments, including those that are low in oxygen.
Option A is incorrect because facultative bacteria can also survive in the absence of oxygen. Option B is incorrect because facultative bacteria can also survive in the presence of oxygen. Option D is incorrect because facultative bacteria can survive in both the presence and absence of oxygen.