Which sentence does not contain any punctuation errors? a. i have a new wool, sweater that is a deep shade of purple. b. i have a new, wool, sweater that is a deep shade of purple. c. i have a new wool sweater that is a deep shade of purple. d. i have a new, wool sweater that is a deep shade of purple.

C. I have a  new wool sweater that is a deep shade of purple.

The reason this is correct is because there is no need for a comma between an adjective and the noun it modifies. Therefore A. and B. are incorrect. As well, commas should only be used in-between adjectives when the adjectives only modify the noun, not each other. This means you should be able to switch the nouns around and have it still make sense. "wool new sweater" does not make sense, so you do not need a comma in-between the adjectives. That is why" C. I have a new wool sweater that is a deep shade of purple." is the correct answer. 

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