To Prevent Any Possibility of Harm to Subjects Due to Disclosure

Multiple Choice

To prevent any possibility of harm to subjects due to disclosure of information, it is critical to preserve subject confidentiality by ______.

A) sending follow-up mailings to the respondents at their home addresses to make certain all is well that they are safe
B) phoning subjects to ensure safety
C) using only numbers to identify individuals on their questionnaires
D) releasing contact info, including name and telephone numbers, to an unknown third party related company for follow-up