What is the best definition for the concept of refusing?

A)to refuse to do things that would harm the environment
B)to use again anything that you can, rather than throwing it away or using disposable items
D)to turn materials into new raw materials for other products
E)to use disposable materials as much as possible
C)to minimize the amount of resources that you use

A) to refuse to do things that would harm the environment.

The best definition for the concept of refusing is option A: to refuse to do things that would harm the environment.