A researcher wants to determine how most U.S. college students feel about the president of the United States. Which of the following groups provides a representative sample for this researcher's survey?

a. students selected randomly at college campuses across the country.
b. students of political science who have studied current events.
c. honor roll students who have pledged to be truthful
d. students attending religious colleges in the South

Ans: a. students selected randomly at college campuses across the country.