Question: Which is true of scientific discoveries?

  Options: 
 A. All scientific discoveries are based solely on observation and never experimentation.
 B. Sometimes scientific discoveries are made by accident, like the discovery of penicillin.
 C. If a scientist cannot provide the exact time and place his or her discovery was made, it is dismissed.
 D. All scientific discoveries are regulated by government agencies, like the Food and Drug Administration.
Answer: B