Here's a problem to solve: Recycling of a resource, such as paper, is important because

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

- A: paper companies cannot make enough paper.
 
- B: using recycled paper reduces the cutting of new trees.
 
- C: most paper is made from species of trees that are endangered.
 
- D: recycled paper is less expensive than paper made without recycling.
 