Grammar English Test

[LucasGabriel]

Hy everyone. I just had a test on English Grammar and I would like to discuss, all the questions that I missed, with you guys. I know there is a limit about questions, one per post, but I am up to post one by one all the questions. So who is in ?
Here is the first question :
1. Which of the following is the correct revision of this sentence?
Since the traffic on the highway coming home was always so bad, Carmen started to take a route that was more quiet and with less cars.

a. Since the traffic on the highway coming home was always so worse, Carmen started to take a route that was quieter and with less cars.
b. Since the traffic on the highway coming home was always so bad, Carmen started to take a route that was quieter and with fewer cars.
c. Since the traffic on the highway coming home was always so worse, Carmen started to take a route that was more quiet and with fewer cars.
d. All of these are correct revisions
e. No revision needed.

I chose the point b, because of so bad, quieter and fewer cars . What you think guys?

[Alan]

Correct.