Which sentence uses the contraction for 'it is' correctly?

Which sentence uses the contraction for 'it is' correctly?

• A. Its a sunny day.
• B. Its' going to be fine.
• C. It's sunny outside.
• D. It's dog is barking.

Answer: (C)

The sentence uses the contraction for “it is” correctly when the apostrophe is placed to stand in for the missing letters in “it is.” Here, describing the weather, you want “it is sunny outside,” which shortens neatly to “it’s sunny outside.” The word its is possessive and would mean something belongs to it, which isn’t the case in this sentence. An apostrophe placed after the s in its’ is not a valid form in standard English, and using it here doesn’t create a correct contraction. The wording with its dog is barking would require a different construction (such as “Its dog is barking,” where its is possessive) or a rephrasing like “The dog is barking.” The only sentence that uses the contraction of “it is” correctly and remains grammatically standard is the one with it’s sunny outside.