What aspect is least likely to contribute to effective exam preparation?

The choice that indicates "only skimming through materials quickly" is the least likely to contribute to effective exam preparation because thorough understanding and retention of knowledge require more in-depth engagement with the study material. Skimming often results in missing key concepts, details, and connections between topics, which are crucial for achieving a deeper comprehension necessary to excel in exams. This approach does not allow time for reflection, application, or critical thinking, all of which are essential components of solid study habits.

In contrast, completing practice questions actively engages you with the material and helps reinforce learned concepts. Creating a distraction-free study environment minimizes interruptions, allowing for better focus and concentration. Formulating a study plan provides structure and ensures that all necessary topics are covered systematically, thereby enhancing retention and understanding. These strategies collectively foster a better and more effective preparation experience, contrasting with the inadequacies of only skimming materials.