Researchers are conducting a study where they have concerns that the participant's beliefs and/or the experimenter's beliefs may skew the results. therefore, they chose to conduct a study.

The correct answer is double blind study

This is a research whereby information about the experiment or test is withheld from the subjects until after the test is carried out so as to ensure that it does not influence the tester or even the participant

answer; i believe the correct answer is (crops);

sumerians were polytheistic, meaning they believed in many different gods. so, the best answer is c.