What is the professor's attitude about the use of microwave ovens by pharmaceutical companies in the production of medicines? A. The use of microwave ovens is hazardous because it prevents control of temperatures. B. The use of microwave ovens produces satisfactory results but is not worth the added expense. C. The use of microwave ovens may allow companies to produce medicines more efficiently than traditional heating methods do. D. More research should be done before replacing traditional heating equipment with microwave ovens.