Which sentence shows correct capitalization and use of end marks inside parentheses?


I put your guitar (The dog keeps knocking it over) back in your room.
I put your guitar (The dog keeps knocking it over.) back in your room.
I put your guitar (the dog keeps knocking it over.) back in your room.
I put your guitar (the dog keeps knocking it over) back in your room.

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The sentence that shows correct capitalization and use of end marks inside parentheses is: "I put your guitar (The dog keeps knocking it over.) back in your room."