Here's a problem to solve: Elephants on the African savanna eat shrubs and small trees. This behavior clears land and enables grass to grow. Grazers such as gazelles eat the grass. Lions prey on the gazelles. Which two organisms in this scenario are in the most cooperative relationship?

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

- A: the elephants and the shrubs
 
- B: the shrubs and the lions
 
- C: the elephants and the gazelles
 
- D: the gazelles and the lions
 