The word in the provided sentence which should be capitalized is the word Sunday.
Option C is correct.
Capitalization is the act where the words are written in capital letters in a sentence.
The name of days, months and the holidays are the proper nouns which should be necessarily be written in the capital letters whenever using in the sentence.
Therefore, the option C is the word which needs to capitalized in the given sentence.
Learn more about the capitalization in the related link:
https://brainly.com/question/7672602
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