Here's a problem to solve: A pharmaceutical company developed a drug to help relieve headaches. Recently, the pharmaceutical company discovered that the drug may cause nausea in a small number of people who might take the drug. Which is the most ethical course of action that the drug company could take?

Among the 4 following options, which is the correct answer?

- A: Discontinue the use of the drug.
 
- B: Inform people of the possible side effects.
 
- C: Reduce the amount of drug given to people.
 
- D: Modify the drug to include medicine that prevents nausea.
 