__________ is a vote to end debate which requires a three-fifths vote of the entire membership of the Senate

Which is an example of a democratic socialist society?

a) The Soviet Union b) North Korea c) China d) None of the above

When research participants know what condition they have been assigned to, they might change their behaviors in ways that would be expected from somebody in that condition. This problem can be avoided by using

a. a placebo group. b. random assignment of participants to groups. c. mundane realism. d. a blind study.