Question

Which search term combination would most likely provide reliable facts for a research project on the costs of solar power?

Solar power
Solar power costs .gov
Solar power design .com
Solar power resources .org

Answer 1

It would be .gov and .org since they are reliable sources since one is government and the other is an organization which do in detail searches and documentation on the topic.

Answer 2

It is .gov since things concerning power and the costs of power have something to do with government sites. But . org does hold reliable facts, although . gov is a more promising answer.