Question

the movement of the progress bar may be uneven because questions can be worth more or less (including zero) depending on your answer.
read this excerpt from a passage.
in 2010, a research team at the university of minnesota began a three-year study of later start times at high schools in three states. they compared schools having earlier, more traditional start times with schools starting at times that correspond better to teens’ circadian rhythms. not surprisingly, the results, published in 2014, showed that some positive things happened at the schools with later start times. students earned higher grades in core subject areas. they performed better on achievement tests. and there were fewer absences and tardy arrivals. the research team reported other benefits associated with a later school start time (which means more sleep for teens).
what was the cause associated with the positive effects researchers discovered at the schools?
○ continuing using traditional start times.
○ implementing later start times.
○ students earning higher grades in core subject areas.
○ a three-year study of later start times.

Explanation:

The passage states that the research compared schools with traditional start times and those with later start times that match teens’ circadian rhythms. The positive effects (higher grades, better test performance, fewer absences/tardies) were in schools with later start times. The other options: continuing traditional times is not the cause of positive effects (the positive effects were in non - traditional, later start time schools); higher grades are an effect, not a cause; the three - year study is the research method, not the cause of the positive effects. So the cause is implementing later start times.

Answer:

B. Implementing later start times.