Which sentence correctly uses capitalization for proper nouns?

• A. She will study at harvard university.
• B. She will study at Harvard University.
• C. She will study at harvard University.
• D. She will study at Harvard University.

Answer: (D)

Capitalizing proper nouns signals a specific, unique place or institution. Harvard University is the official name of a particular institution, so both words in the name are capitalized. In the sentence, the phrase “Harvard University” functions as the proper noun after the preposition “at,” so it should appear with both words capitalized and the sentence ends with a period. The other forms break this rule by using lowercase for the name or only capitalizing one part, which isn’t correct for a proper noun.