You heat a piece of iron from 200 to 400k what happens to the atoms energy of random motion

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.

Declaration of independence basically declares war with britain while bill of rights is document with the rights of the people written down.