Which of the following is an example of how research into the effects of a chemical has changed how it is used?

A. Finding out that a pesticide is dangerous but continuing to use it
B. Finding out that asbestos is dangerous and limiting its use in building materials
C. Using a new kind of material made by chemists to make clothes, instead of cotton
D. Using salt to preserve meat

Question

Which of the following is an example of how research into the effects of a chemical has changed how it is used?

 		A.	Finding out that a pesticide is dangerous but continuing to use it
 		B.	Finding out that asbestos is dangerous and limiting its use in building materials
 		C.	Using a new kind of material made by chemists to make clothes, instead of cotton
 		D.	Using salt to preserve meat