According to Richard Branson, founder of Virgin Atlantic airlines, you can set a really hard goal, such as increasing your class study time 50%, which is "stretching yourself beyond what your mind might think is safe," also known as a(n) .

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