Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways of leave out essential information. A. Legumes make the soil more fertile by hosting bacteria in their root nodules. B. Nitrogen fixation makes compounds that plants and bacteria in legumes can metabolize. C. Bacteria living in the roots of legumes makes the soil more fertile by producing nitrogen compounds that plants can metabolize. D. The root nodules of legumes contain bacteria, nitrogen gas from the atmosphere, and nitrogen compounds that plants can metabolize.