A scientist has noted a possible relationship between a certain chemical substance found in fish and the occurrence of kidney failure in humans. Which of the following preliminary steps should the scientist take before conducting a controlled experiment?

A. Establish a cause and effect relationship between the substance and the outcome.

B. Review the literature to determine what other research is available on this topic.

C. Write a research grant proposal to the appropriate federal funding agency.

D. Distribute letters of consent to human subjects who will be used in the research.

D?

4 answers

I disagree.

I think B because he will need to review the literature before preceding with experiment, correct?

I agree. B is the answer.

comparing two things