Why Molly used the singular noun in her valedictory:

The University of North Carolina has a rich heritage of academic
excellence. Chartered in 1789, UNC was the first public university in
the United States and the only one to graduate students in the
eighteenth century. Today, UNC is a multi-campus university composed of 16 constituent institutions.
The university consists of each public educational institution that
grants baccalaureate degrees in the state of North Carolina. To learn
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Carolina, please feel free to explore this site.