Here's a problem to solve: In the life cycle of a frog, which of the following best describes what happens after the tadpole stage?

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

- A: The tail grows and the gills disappear.
 
- B: The gills develop and the front legs appear.
 
- C: The rear legs grow and the lungs disappear.
 
- D: The lungs develop and the tail becomes shorter.
 