Here's a problem to solve: A rabbit population has increased noticeably in the past ten years. Which of the following is a reasonable hypothesis for this population growth?

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

- A: Competition for food has increased among rabbits.
 
- B: The rabbit's main predator has been eliminated by human development.
 
- C: Abnormal weather conditions have decreased water levels of the local ponds.
 
- D: An organism that relies on similar food sources has migrated into the area.
 