Answer:
During travel-heavy times of year, gasoline prices tend to rise due to people's increased demand for fuel.
Explanation:
In a way, all of the options are correct: but most of them are not very explicit and too general. For example, a formal scientific study will as a result provide some insight into the topic: but this is not the direct goal of the study.
The best answer is that formal, scientific studies have the aim of testing the hypothesis- this is the correct answer.
"<span>D. Blacklisted workers were viewed as troublesome, untrustworthy, and even dangerous by other employers" is the best option from the list, since the "blacklist" in this sense "flagged" them for future employment. </span>
