Which sentence uses quotation marks correctly?
a. Edgar Degas's painting "The Star" shows a ballerina dancing on a stage.
b. The play called "A Raisin in the Sun" by Lorraine Hansberry is an American classic.
c. Guy de Maupassant's short story "A Piece of String" is about a man trying to convince others of his innocence.
d. John Reynolds Gardiner's book "Stone Fox" is an exciting tale about a dogsled race.
d?