Sally was reluctant to answer questions about her personal hygiene until she saw that the survey was sponsored by the american medical association. sally's understanding of who sponsored the survey with which aspect of "overcoming the respondent's unwillingness to answer"?

The answer is "legitimate purpose".

Among the potential components influencing survey response, three of them are the subject of the survey, who is sponsoring the survey, as seeing some credible source can enhance the respondent's willingness to answer questions, and the survey provider, are the essential determinants.