Critical Reasoning (CR) | Re: Chaco Canyon, a settlement of the ancient Anasazi culture

Chaco Canyon, a settlement of the ancient Anasazi culture in North America, had massive buildings.It must have been a major Anasazi center. Analysis of wood samples shows that some of the timber for the buildings came from Chuska and San Mateo Mountains, 50 miles from Chaco Canyon. Only a major cultural center would have the organizational power to import timber from 50 miles away.

Conclusion: It must have been a major Anasazi center.
Rest of the sentences provide reason for this conclusion that
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