Although energy prices have tripled

[BTGmoderatorDC]

Although energy prices have tripled in the United States over the last two years, research indicates few people to have significantly reduced the amount of driving they do, nor are they making fuel efficiency a priority when shopping for cars.

A. few people to have significantly reduced the amount of driving they do, nor are they making

B. few people having significantly reduced the amount of driving they do or made

C. that there are few people who have significantly reduced the amount of driving they do, nor having made

D. that few people have significantly reduced the amount of driving they do and are not making

E. that few people have significantly reduced the amount of driving they do or made

Why Option A isn't the correct option?

OA E

[GMATGuruNY]

Why Option A isn't the correct option?

to indicate = to show.
A: research indicates few people
Here, what does research show?
It shows FEW PEOPLE.
Not the intended meaning.
Clearly, research does not show the existence of few people.
Eliminate A.

The intention here is to discuss not the EXISTENCE of people but what people HAVE DONE.
To convey this meaning, we must include that, as in the OA:
Research indicates THAT few people have significantly reduced the amount of driving they do.
Here, what does research show?
It shows THAT FEW PEOPLE HAVE SIGNIFICANTLY REDUCED THE AMOUNT OF DRIVING THEY DO.
This meaning makes sense.