From the point of view of publishers and broadcasters, regulations were necessary to prevent ______.

________________ of participants is done to obtain a representative sample, and __________ of the participants is done to improve the experimental design of the study

a. Random selection; random assignment b. Random selection; random sampling c. Random assignment; random selection d. Random assignment; matching

Which of the following is currently a primary factor that predicts whether someone will vote?

  a. place of residency  b. race  c. gender   d. political party