Which of the following sentences displays the CORRECT use of punctuation?

A. Leonardo da Vinci, inventor, painter, and poet is considered a true genius.
B. Leonardo da Vinci (inventor, painter, and poet) is considered a true genius.
C. Leonardo da Vinci, inventor, painter, and poet, is considered a true genius.
D. Leonardo da Vinci—inventor, painter, and poet—is considered a true genius.

D. Leonardo da Vinci - inventor, painter, and poet - is considered a true genius.

The correct answer is C. "Leonardo da Vinci, inventor, painter, and poet, is considered a true genius."

This sentence correctly uses commas to set off the list of Leonardo da Vinci's occupations.