Sentence Correction (SC) | The National Geographic Society's electronic database,

The National Geographic Society's electronic database, available free of cost to researchers affiliated with government think-tanks or university studycenters, originally stored in microfiche sheets that were manually accessed through the Society's free access facilities, but is now accessible through remote data access services.
A) centers, originally stored in microfiche sheets that were manually accessed through the Society's free access facilities, but is -
A fragmented sentence since verb
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