To determine the average time that people spend exercising, Molly surveyed people at the local gym. What is the most likely reason for bias in Molly's survey? A. The people at the gym are not likely to be representative of the entire population in terms of time spent exercising. B. The person with the average exercise time might not be at the gym during Molly's survey. C. Surveying people in only one gym is insufficient. She should include more gyms. D. People working out at the gym may be too tired to answer the survey carefully.

Question

To determine the average time that people spend exercising, Molly surveyed people at the local gym.   What is the most likely reason for bias in Molly's survey?    A. The people at the gym are not likely to be representative of the entire population in terms of time spent exercising.    B. The person with the average exercise time might not be at the gym during Molly's survey.    C. Surveying people in only one gym is insufficient. She should include more gyms.    D. People working out at the gym may be too tired to answer the survey carefully.