Mutualism Is a Relationship

Mutualism is a relationship

A) that provides benefits for both members, sometimes to the point that one cannot live without the other.
B) where only one member derives benefit from the other.
C) where one member of the relationship may kill the other.
D) where one member of the relationship benefits without hurting the other.
E) where it is difficult to prove the benefits or disadvantages one member of the relationship may provide for the other.