Here's a problem to solve: A green tree frog lives in a forest. How does the frog's green color help it to survive?

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

- A: By helping the frog find other frogs
 
- B: By keeping the frog cool
 
- C: By making the frog hard to see when sitting on leaves
 
- D: By allowing the frog to make its own food
 