Effective Strategy(ies)to Increase Initial Response Rates Is (Are)

Multiple Choice

Effective strategy(ies) to increase initial response rates is (are)

A) asking respondents to complete a simple task at the beginning.
B) offering respondents money for cooperation.
C) using a good quota sampling plan.
D) asking respondents to complete a simple task at the beginning and offering money for cooperation.
E) All of these are correct.