Answer:
a. Smaller class size is related to better academic performance.
Explanation:
A hypothesis is a testable prediction, a scientific guess of what you expect to happen from a study. There are directional and non directional hypothesis, the directional hypothesis states exactly what you expect such as " smaller class size is related to better academic performance while a non directional hypothesis predicts that there will be an effect but does not specify the direction, example is "smaller class size is related to academic performance".
The option chosen is an example of a directional hypothesis, option b, c, and d are more statements of facts and not hypothesis.
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According to what I have read, this has been happening because every United States state is also a sovereign and independent entity in its own right and is granted the power to create and apply laws, and regulate them according to their needs. In addition, some laws, such as certain voting laws and criminal laws and statutes, tend to be somewhat uniform across states; nevertheless, some areas of law can be very, very different from one state to the next.
