Question 75 of 100 The New Jersey Department of Transportation (NJDOT) believes that there are differences of opinion among the officials of different counties about expansion of public transportation in the state. Therefore, NJ DOT has decided to take a sample of the officials for interview, and has planned to select a random sample of officials from each county in New Jersey. This is an example of a A.Simple random sample B.Cluster sample C.Stratified random sample D.Systematic sample E.Convenience sample