From the question stem we can see that claim made by analyst is that sales of electric cars in ubran area will increase this year.
For support we are given that improvements in battery tech will lower the cost of electric cars and it will make them more affordable.
From pre thinking we can see analyst is assuming that cost is one of the factors for choosing electric cars.
Let's look at the options one by one and try to eliminate wrong answers:
(A) Urban infrastructure, such as charging stations, will become more widely available in city areas this year.
So if there are more charging stations, it could be useful to some people. But we don't need to assume this. Even if there are no new widely available charging stations, some people will still buy it. There is no where mentioned that lack of charging stations is why people are not purchasing electric cars. So
eliminate.
(B) The performance of electric cars, in terms of speed and comfort, is on par with that of gasoline-powered cars.
Again, we don't need to assume this. Even if they are not, some people could be not looking at speed and comfort and rather just want to save environment.
Eliminate(C) City dwellers are primarily motivated by cost savings when choosing a vehicle.
This is something analyst is assuming. One of the support provided by analyst is that improved battery will decrease the cost of car. And this support is used for prediction that more electric cars will be purchased. If this assumption is negated that cost saving is not a factor for choosing a vehilce, then prediction falls apart. So
Keep it.(D) The cost of gasoline will remain stable throughout the year.
No need to assume this. We are not provided with any info about how gasoline affect sale of electric vehilcle. Could be true or false. Prediction will not change.
Eliminate.(E) The production of electric cars will be sufficient to meet the increased consumer demand this year.
Hmm. This could work but is very weak. If assumption was negated, we can make a long guess that sales will not increase that much as there is no supply. But reading the question stem again, it says sales and pre-orders. So even if there was lack of supply, people will pre-orders. So, don't need to assume this.
Eliminate