Which of the following scenarios are free from bias?
A. A scientist is conducting an experiment on liver disease that is funded by a pharmaceutical company, and has set up the experiment as a double-blind study testing of a new medication.
B. A scientist is conducting an experiment on liver disease that is funded by a university, and has set up the experiment as a double-blind study testing of a new medication.
C. A scientist is conducting an experiment on liver disease that is funded by a university, and has set up the experiment study testing of a new medication and only give the medicine to the healthiest patients.
D. A scientist is conducting an experiment on liver disease that is funded by a pharmaceutical company, and has set up the experiment as a double-blind study testing of a new medication on people without liver disease as well as those with liver disease.
Answer: B
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