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The answer would be "C"
A. would not be correct because "Martha" needs to be capitalized because it's a proper noun. A proper noun is the name of a specific person, place, or thing.
B. would not be correct because because 'University" needs to be capitalized because it's also a proper noun.
C. would be correct because there is no errors in spelling.
D. would not be correct because 'Mount Vernon" needs to be capitalized because it's a proper noun.