A newspaper posted this question on itswebsite: "How often do you seek medical informationonline?" Of 1072 Internet users who chose torespond, 38% of them responded with"frequently." What term is used to describe this type of survey in which the people surveyed consist of those who decided torespond? What is wrong with this type of samplingmethod?

What term is used to describe this type ofsurvey? Select all that apply.

A.

The respondents are a population.

B.

The respondents are a voluntary response sample.

C.

The respondents are a census.

D.

The respondents are aself-selected sample.