Which of the following sentences displays the correct use of punctuation? (1 point)
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.