Which of the Following Three Interactions Are Mutualisms

Multiple Choice

Which of the following three interactions are mutualisms?
I: Wasp and butterfly larvae. The wasp lays its eggs inside the body of a butterfly larva. The eggs hatch and the wasp larvae feed on the body of the butterfly larva. By the time the wasp larvae metamorphose from the butterfly larva, the butterfly larva is killed.
II: Fig and fig wasp: The adult wasps crawl into the cluster of fig flowers to lay eggs. By moving around, the adult wasp pollinates the fig flowers, allowing them to produce fruit and seeds. As the fig fruit develops, it provides shelter for the wasp larvae.
III: Ants and acacias: Acacia plants develop hollow thorns that provide shelter for ant colonies and produce nectaries on their leaves that provide food for ants. The ants defend the acacia plant from herbivores.

A) I only
B) II only
C) III only
D) I and II
E) II and III