HELP ASAP Four important facts/ideas on how machu picchu influenced the Civilizations of the Americas

Background info: Machu Picchu is a 15th-century Inca site located on a ridge between the Huayna Picchu and Machu Picchu mountains in Peru. The site’s excellent preservation, the quality of its architecture, and the breathtaking mountain vista it occupies has made Machu Picchu one of the most famous archaeological sites in the world today.

4 facts:  Machu Picchu is believed to have been built by Pachacuti Inca Yupanqui, the ninth ruler of the Inca, in the mid-1400s.

Machu Picchu was an astronomical observatory, and its sacred Intihuatana stone accurately indicates the two equinoxes. Twice a year, the sun sits directly over the stone creating no shadow.

Machu Picchu is made up of more than 150 buildings ranging from baths and houses to temples and sanctuaries.

A long-standing dispute between Peru and Yale University has existed over the artifacts collected by Bingham during his exploration of the site. Yale maintains that they own the items while Peru insists they were given on loan.

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c is the correct answer for this question.

the answer would more than likely a.)falling crop prices  

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