The formal beginning of psychology occurred in Germany and the United States by which two men? A. William James and Wilhelm Wundt B. Sigmund Freud and William James C. Carl Jung and Wilhelm Wundt D. Sigmund Freud and Carl Jung A. William James and Wilhelm Wundt

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

the atmospheric gas that forms a mild acid when dissolved in water is called carbon dioxide. the correct answer is a. 2.) chemical weathering would cause an inscription on a marble headstone to become harder and harder to read over time.