What has been used extensively and successfully in many states by opponents of gay marriage?

The following are advantages to between subjects designs: no attrition, reduced fatigue, multiple dependent measures, and increased statistical variance

Indicate whether the statement is true or false

Which factor contributed most to the collapse of regimes such as those in the Soviet Union?

a. ineffective security forces b. a lack of sustained public support c. deviation from true Marxist ideology d. lack of decisive policy making by government officials