Identify whether each of the following statements is more appropriate as the null hypothesis or as the alternative hypothesis in a test:

a. Hypothesis: The number of hours preschool children spend watching television affects how they behave with other children when at day care.

b. Hypothesis: Most genetic mutations are deleterious to health.

c. Hypothesis: A diet of fast foods has no effect on liver function.

d. Hypothesis: Cigarette smoking influences risk of suicide.

e. Hypothesis: Growth rates of forest trees are unaffected by increases in carbon dioxide levels in the atmosphere.