Answer: C) Leonardo da Vinci’s Mona Lisa is an important piece of Italian Renaissance art.
Explanation: From the given options, the one that shows the correct capitalization is the corresponding to option C: "Leonardo da Vinci’s Mona Lisa is an important piece of Italian Renaissance art" because, "Leonardo da Vinci" is a proper noun, but "da" shouldn't be capitalized because it is the Italian equivalent to say "Leonardo of Vinci", "Italian" should be capitalized, and also "Renaissance."