Question: Until recently the Grand Canyon was thought to be about 5-6 million years old. Recently a scientist gathered data and wrote a paper for a scientific journal that indicated the canyon is about 17 million years old. Before this new information about the canyon is accepted, which of these needs to occur?

  Options: 
 A. The scientist needs to publish additional papers.
 B. The scientist needs to obtain government support.
 C. Other scientists need to state their beliefs.
 D. Many scientists need to evaluate the data.
Answer: D