___ Unions have more lobbyists registered with state governments than do businesses

Liberal democracy was successfully implemented in East Germany until the collapse of the Berlin Wall

Indicate whether this statement is true or false.

If you were conducting survey research, which of these things is more likely than the others to undermine its validity?

a. Researchers purposely avoid discussion of controversial issues with people who are part of a prospective random sample. b. People who are part of a prospective random sample screen their phone calls. c. People who are part of a prospective random sample are contacted as close to Election Day as possible. d. Researchers ask people who are part of a prospective random sample too many open-ended questions.