Which of the following is an example of a nondirectional hypothesis?

A) There is a positive relationship between a high-fat diet and weight gain.
B) There is a negative relationship between a high-fat diet and weight gain.
C) There is a relationship between a high-fat diet and weight gain.
D) There is no relationship between a high-fat diet and weight gain.

Option C is a nondirectional hypothesis because it does not specify the direction of the relationship between high-fat diet and weight gain. It simply states that a relationship exists between the two variables. Options A and B are directional hypotheses because they state the direction of the relationship. Option D is a null hypothesis as it suggests there is no relationship between the two variables.