If there is random assignment, a research study can be said to be a(n) _______________

Research on bereavement has shown that:

a. the positive impact of church attendance on the grieving has little to do with the social support that people receive at church. b. women have higher mortality rates following bereavement c. men have higher rates of depression following bereavement. d. young people suffer more health consequences following bereavement than older people.

The fact that we see afterimages is supported by the opponent-process theory of color vision

Indicate whether the statement is true or false