29. Which of the following correctly describes Mutualism?

A. Mutualism is the type of interaction where both species benefit from the relationship

B. Mutualism is the type of interaction where one organism benefits while the other is not harmed nor affected.

C. Mutualism is a type of interaction where one benefits while the other one is harmed or badly affected.

D. Mutualism is a type of interaction which is a striving between organisms for the things needed for survival.​