Which Statement Best Describes the Evolutionary Significance of Mutualism

Which statement best describes the evolutionary significance of mutualism?

A) Mutualism offers more biodiversity to a community through positive interaction.
B) Individuals partaking in a mutualistic relationship are more resistant to parasites.
C) Interaction increases the survival and reproductive rates of mutualistic species.
D) Mutualistic interaction lessens competition in communities where it is present.
E) Mutualistic relationships allow organisms to synthesize and use energy efficiently.