Critical Reasoning (CR) | Re: In South America, where pomegranate trees are not native plants, the

In South America, where pomegranate trees are not native plants, the trees' flowers have, in the past, been pollinated manually by laborers. This manual process has kept the production of pomegranate fruit unnaturally low. When a variety of snout beetle known to be effective pollinators were introduced into South America five years ago, pomegranate fruit productivity increased by nearly 40 percent, but then decreased sharply last year.

Which of the following statements would best explain last