BrahmaReddy
It is said people priorities eco friendly over performance. So if they do so, they will get performance as extra benefit. So how it casts the doubt on conclusion?
Our premise is that more people are choosing to purchase eco friendly automobiles now. Based on that premise the author has concluded that people are prioritising eco friendliness over performance.
To weaken this conclusion we need to find some factor that would tell us that people are still prioritising performance and not eco friendliness even if they are purchasing more eco friendly automobiles
So choice E is telling us that the most eco friendly vehicles are in fact the highest performance automobiles.
So the conclusion that people are prioritising eco friendliness does not hold. Because people are actually still prioritising performance. But it’s just that the high performance automobiles happen to be eco friendly