PT38.S4.Q14-- help-- part 2

Darklord

Hi,

So I got this question wrong because D looked wrong to me (D was actually the right answer).

The stimulus is saying that reduced speed limits do not protect the environment because it makes it so that cars spend more time spewing exhaust on the road.

To me, this meant that the author was assuming that if you spend more time on the road driving slowly, you will spew more exhaust (or the same) than if you were driving faster

In order for this to be true, time has to play a big factor in the amount of exhaust spewed; but is it the most important (which is the meaning of "primary")? And what if it only determines a big part of the emission spewed but not the "total" emission? I feel like the argument would still stand

This is why “total emission” and “primarily” seem like logical jumps for me

Can anyone show me the flaw in my reasoning that makes D correct?

Admin Note: https://7sage.com/lsat_explanations/lsat-38-section-4-question-14/

Confidence150

I think of “primarily”in answer choice D as mostly by. Answer D is correct as the amount of time driven by the car factors into the emission rate and because of this, the environment is not protected.