Identify the example of when situation and time are key to assessing risk of harm in a…

Identify the example of when situation and time are key to assessing risk of harm in a research study:
Research on the prevalence of retired individuals who have been harassed in different academic disciplines
A study on the efficacy of a behavioral intervention for smoking cessation that involves both adults and teenagers in the United States
A survey with educators on their experience about implementation of a novel preschool program
A study asking women if they have completed an advanced degree and what city they were born in