To Overcome One of the Shortcomings of Telephone Surveys Due

Multiple Choice

To overcome one of the shortcomings of telephone surveys due to unlisted telephone numbers:

A) survey takers purchase mail lists of unlisted telephone number subscribers.
B) survey takers employ random digit dialing facilities.
C) survey takers contact telephone companies for a list of unlisted telephone numbers.
D) survey takers purchase lists of unlisted telephone numbers from magazine subscribers.
E) survey takers go door to door and identify the unlisted telephone subscribers.