Question

By 2016, national fuel economy standards will require car manufacturers to make cars that meet

Answer 1

It's the 3rd from the top.

Step-by-step explanation:

Answer 2

By 2016, national fuel economy standards will require cars that meet : 39 Mpg.
The higher the rate is, the more environment friendly the cat would be, since it could cover a longer distance with lesser fuel.

Hope this helps