Sentence Correction (SC) | Re: New York City is the largest city in the USA although Washington, D.C.

New York Cityis the largest city in the USA although Washington, D.C. is its capital.

A. is the largest city in the USA although Washington, D.C. isits - Pronoun reference error*
B. is the largest city in the USA, but Washington, D.C. isits - Pronoun referenceerror*
C. is the largest city in the USA although Washington, D.C. is the USA's - Correct answer
D. is the USA's largest city although Washington, D.C. isits - Pronoun reference error*
E. is the largest city in the USA,and Washington,
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