Final answer:
The sentence capitalized correctly is 'James Monroe was the fifth president of the United States.'
Step-by-step explanation:
The sentence capitalized correctly is: James Monroe was the fifth president of the United States. In this sentence, the proper noun 'James Monroe' is capitalized, as well as the first letter of the sentence. Additionally, the ordinal number 'fifth' is capitalized because it is part of the position in the sequence of U.S. presidents.
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