The word "steep" (line 1 Para. 4) is closest in meaning to ______.

A．people are more interested in fast automobiles than in their health
B．Americans feel more closely tied to their cars than to their wives
C．kerosene-burning engines would pollute the environment more than gasoline-burning engines do
D．kerosene-burning cars would go faster than gasoline-powered cars

A．American political parties in the twentieth century.
B．The role of ideology in American politics.
C．The future direction of United States politics.
D．Difference between Republicans and Democrats.