Here's a problem to solve: A student pushes against a tree with a force of 10 newtons (N). The tree does not move. What is the amount of force exerted by the tree on the student?

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

- A: 0 N
 
- B: 5 N
 
- C: 10 N
 
- D: 20 N
 