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Read the following scenario to answer the following questions.
Nitrogen shortage is a common nutritional problem for plants. In crops, a nitrogen deficiency can result in stunted growth as well as lower nutritional content. Farmers sometimes apply fertilizers containing nitrogen as well as other essential nutrients, such as phosphorus and potassium. Compost can also be used to fertilize soils. Compost consists of vegetable matter that adds nutrients to soil as it is decomposed by microorganisms, fungi, and animals. Certain plants, including legumes such as peas and beans, house nitrogen-fixing bacteria in swellings called "root nodules." The bacteria have enzymes that help convert atmospheric N2 to ammonium ions that can be readily used by the plants. The plant, in turn, provides the bacteria with other nutrients. When conditions are favorable, root nodule bacteria fix so much nitrogen that the nodules secrete excess ammonia.
Which approach could an organic farmer use to deal with nitrogen deficiency?
A) plant legumes in alternate years and fertilize the soil with compost
B) apply synthetic fertilizers that provide nitrogen
C) plant legumes in alternate years and use synthetic fertilizers
D) use genetically modified plants that require less nitrogen

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