During the Observations of a Species of Blue Moon Butterflies

Multiple Choice

During the observations of a species of blue moon butterflies on the Samoan islands of Upolu and Savaii,99% of the butterflies were originally female and only 1% were male,but in only five years the male:female sex ratio had returned to nearly the expected 1:1.What caused this?

A) Wolbachia lost the ability to kill male butterflies.
B) Evolutionary changes in the butterflies allowed the butterflies to suppress the male-killing effect of Wolbachia.
C) All of the above
D) None of the above