Southern california beaches would have more sand if

Identify the example of when situation and time are key to assessing risk of harm in a research study: a study on the efficacy of a behavioral intervention for smoking cessation involves both adults and teenagersasking women if they have had an abortionresearch on the prevalence of hiv-infected individuals in communitiesa survey about sexually transmitted diseases

What happened in georgia as a result of the supreme court ruling in brown v. board of education?

What are the five traits of a civilization?