What do most professors require students to use as references in literature reviews?

Research results indicate that the more time individuals spend watching educational television programs as preschool children, the higher their high school grades will be. This is an example of a ____ relationship between variables

a. cause-and-effect b. coincidental c. positive d. negative

Although a case study typically involves a single participant, the results can serve as a counterexample that influences an entire theory

a. True b. False Indicate whether the statement is true or false