The average fuel efficiency of vehicles sold nationwide during the period 2000- 2004 was 25 miles per gallon; the corresponding figure during the period 1995- 1999 was 20 miles per gallon. The national average price of gasoline during the period 2000-2004 was $2 per gallon; the corresponding figure during the period 1995-1999 was $1.60 per gallon.

The statements above, if true, best support which of the following conclusions?


A) The average fuel efficiency of vehicles sold nationwide should reach 30 miles per gallon for the period 2005-2009.

B) The national average price of gasoline during 1997 was lower than the corresponding price during 2003.

C) Rising gasoline prices led consumers to purchase more fuel-efficient cars.

D) Between the two described time periods, the national average fuel efficiency and the national average gasoline price both increased at roughly the same rate.

E) Consumers spent more money on gasoline during the period 2000-2004 than during the period 1995-1999.
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The average fuel efficiency of vehicles sold nationwide during the period 2000- 2004 was 25 miles per gallon; the corresponding figure during the period 1995- 1999 was 20 miles per gallon. The national average price of gasoline during the period 2000-2004 was $2 per gallon; the corresponding figure during the period 1995-1999 was $1.60 per gallon.

The statements above, if true, best support which of the following conclusions?
B)The national average price of gasoline during 1997 was lower than the corresponding price during 2003.
>> As per arg we have any avg value so cant prove this.It can be or cant be.
D)Between the two described time periods, the national average fuel efficiency and the national average gasoline price both increased at roughly the same rate.>> Correct.
5/20=1/4 .40/1.60=1/4

Can anyone suggest a strong reason to eliminate C?

Option C:Rising gasoline prices led consumers to purchase more fuel-efficient cars.

Now since nothing is mentioned about the purchase of cars in the passage.
Scene 1: In year 2001 price of gasoline was 3 dollars
But in 2002 it was 1 dollars
in 2003 it was 2 dollars and 2004 it was 2 dollars again

Avg price comes to 2 dollars
But can you see that price did decrease once in 2002 ...so you can't say for sure that price increase of gasoline lead to buying fuel efficient cars

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