In the 17,00s Isaac Newton determined that the force of gravity between two objects depends on the mass of the objects and distance between them. he reason that things Fall towards Earth because it has so much mass. then in 1900 Albert Einstein work with new discovery such as the fact that light always travels the same speed and he's determined a new explanation of how and why gravity works. Mass and distance still matter and Einstein's explanation but speed also matters. Newton's explanation still works for objects close to Earth but Einstein's explanation works for all objects in the universe. what does this demonstrate about the nature of science?

a. When do scientist have different beliefs than older scientists they will research for new facts.

b. All scientists can observe the same facts and determine different explanations about them.

c. If scientists established explanation based on data then the explanations are true and do not need to be changed.

d. Scientistscientist make improved explanations by building on old ideas and working with new ideas.