In a(n) __________ question format, respondents can give any answer

The best way to test the hypothesized link between mercury poisoning and autism would be with

A) An experiment. B) A differential research study because an experiment would be unethical. C) Either an experiment or a differential research study. D) A case study.

Which of the following is true about the conflicts to be found among organized interests?

A. These are more divisive and diverse than those that are prevalent among the general public. B. These typically are resolved by mergers between the conflicting groups. C. These precisely mirror the differences between the parties. D. These mirror and sometimes crystallize divisions and uncertainties prevalent among Americans.