Since the 1960s, as a result of automobile modifications (as well as other factors), carbon monoxide emissions in the U.S. have declined by more than three-fourths and ________ emissions by more than 95 percent.
A) nitrogen oxide and hydrocarbon
B) nitrogen hydroxide and oxygen
C) nitrogen and oxygenated
D) sulfur dioxide and bicarbonate
E) hydrocarbon and sulfur dioxide

Question

Quizplus · Accepted Answer

The reduction in carbon monoxide emissions is most commonly attributed to automobile modifications, which would likely impact nitrogen oxide and hydrocarbon emissions as well. Additionally, the drastic decline in nitrogen oxide and hydrocarbon emissions (more than 95 percent) aligns with the percentage reduction mentioned in the statement. None of the other choices seem to be as closely related to automobile emissions or the degree of reduction mentioned in the statement.

Since the 1960s, as a Result of Automobile Modifications (As