Final answer:
According to the Spring 2018 American College Health Association National College Healthy Assessment II, stress was the most reported factor affecting academic performance.
Step-by-step explanation:
According to the Spring 2018 American College Health Association National College Healthy Assessment II, the most reported factor affecting academic performance was stress. Stress can have a negative impact on a student's memory, thinking, and ability to focus, ultimately hindering their learning experience. Sleep difficulties, depression, and anxiety are also important factors that can affect academic performance, but stress was reported as the most prevalent issue.