The Average Miles Per Gallon Rating of U

Multiple Choice

The average miles per gallon rating of U.S. vehicles has ________________.

A) made no improvement the past two decades
B) doubled since the 2008 election
C) now matched the 45 mpg rating mandated by the European union
D) doubled in the past two decades
E) been raised to 40 mpg because of the 2010 energy bill passed by Congress