Answer to Question 1
B
Answer to Question 2
There are several approaches for improving response rates, including making the data collection instrument and procedure as interesting and as short as possible, carefully choosing and training interviewers, asking respondents to complete a short task before asking them to complete the longer data collection instrument (the foot-in-the-door technique), guaranteeing confidentiality and/or anonymity, notifying potential respondents in advance, personalizing data collection forms as much as possible, providing incentives, disguising the sponsor if necessary, and sending follow-up surveys.