According to recent study data, greenhouse gas emissions from fossil

According to recent study data, greenhouse gas emissions from fossil fuel-based vehicles are a major contributor to global climate instability. One plan to reduce greenhouse gases within the United States is to encourage the production of corn-based ethanol fuels. Such "biofuels" burn cleaner and therefore emit fewer harmful chemicals into the atmosphere. To encourage production, financial incentives could be given to companies to make the switch to biofuel technology.

Which of the following, if true, would cast the most doubt on the effectiveness of the plan to reduce greenhouse gas emissions by encouraging the production of corn-based fuel?


(A) Before any law is enacted to provide financial incentives to biofuel companies, it must pass with a majority vote in both houses of Congress.

(B) While ethanol currently makes up less than 4 percent of the motor fuel used nationally, the corn used in ethanol production constitutes 14 percent of the domestic crop.

(C) Corn-based ethanol production increases food prices and consumes large amount of waters.

(D) The fertilizer used in the cultivation of biofuel crops releases nitrous oxide, a potent, long-lived greenhouse gas into the atmosphere

(E) The scientific study of greenhouse gas emission was conducted by a university that received funding from prominent agricultural lobby groups who would benefit greatly from new legislation.