"By the turn of the 20th century, astronomers knew that the Sun was just one star in a galaxy comprised of billions of other stars. At the time, however, they thought that our galaxy might be the entire universe." This statement best demonstrates (25 Points) A. Scientific knowledge may change as new information is discovered over time B. Scientists wait many years before they modify their beliefs C. Scientific knowledge may change as old information is discarded D. Scientists conduct many experiments across the galaxy to find information about stars