Step-by-step explanation: "Nitrogen-fixing bacteria in the soil and within the root nodules of some plants convert nitrogen gas in the atmosphere to ammonia. Nitrifying bacteria convert ammonia to nitrites or nitrates. Ammonia, nitrites, and nitrates are all fixed nitrogen and can be absorbed by plants."-https://www.Khanacademy.org/
all credit to https://www.Khanacademy.org/
At first I read it wrong and I put D, but I read it again and it was actually C. Sorry
