Read the following context and choose the best option to answer the question.
Context: There must be people out there taking diet pills . I mean , they keep getting made so someone has to be buying them , right ? Do people just buy them randomly or do they do research to find the best diet pills ? The whole thing is so foreign to me .
Question: What would happen if people stopped buying diet pills ?
Options: 
A. None of the above choices .
B. They would do more research about this .
C. They would sell them in foreign markets .
D. They would stop making them .


D