In his theory, Lamarck suggested that organisms will develop and pass on to offspring variations that they need in order to survive in a particular environment. In a later theory, Darwin proposed that changing environmental conditions favor certain variations that promote the survival of organisms. Which statement is best illustrated by this information? A. Scientific theories are not subject to change

B. All scientific theories are subject to change and improvement

C. Most scientific theories are the outcome of a single hypothesis

D. Scientific theories that have been changed are the only ones supported by scientists