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?