A Filter Question Differs from a Double Barreled Question in That

A filter question differs from a double barreled question in that the filter question is:

A) a question designed to identify some subset of survey respondents who are then asked additional questions that are not relevant to the entire sample.
B) a question that is posed as a single question but in fact asks more than one question.
C) a question created by covert researchers but used by overt researchers in their research.
D) a question created by overt researchers but used by covert researchers in their research.
E) a paradigm that argues that we create reality through our interactions and our interpretations of those interactions.