GMAT Critical Reasoning (CR) | Animal control workers in the forest land (GmatClub)

Animal control workers in the forest land around Forestville have been trying to reduce the population of the Wumpus, an aggressive rodent that has been attacking smaller animals in the area. Local residents believe the Wumpus was introduced to the forest about 50 years ago, when a tourist brought a pair of pet Wumpuses that escaped into the wild. Recently, archaeologists digging in the forest have found skeletons of the Wumpus that date back over 2,000 years. This discovery shows that ___.

(A)
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