Scientists working at a hydroelectric plant believe they have discovered a more efficient method of using water to produce electricity. The group that reviews and approves this new method should consist of which group of scientists? 1. Only scientists with backgrounds that are different from the group proposing the new method; they would be more open minded and less influenced by their prior experiences.

2. Only scientists with backgrounds that are similar to the group proposing the new method; they would best understand the process and could promptly approve the new method.

3. Scientists of varied backgrounds; they can question different aspects of the new method, which could lead to greater understanding or the need to re-evaluate the new method.

4. The background of the scientists is not important; science and scientific methods are universally accepted.