Critical Reasoning (CR) | Parisitic Phorid Flies

Option A is the right answer.Harvester ants reduce the food supply of squirrels which pose health hazards to residents of Farmville.
Red fire ants are harmful for the residents because of their deadly sting.So phorid flies should be introduced into Farmville because they are poisonous to ants. The phorid flies should kill only the red fire ants and leave the other ants which are beneficial to the residents of Farmville. The other harvester ants should be left undisturbed because they retard the
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