Read the following information and answer the question.
spanish dancers often use castanets: "two joined pieces of wood or ivory snapped together between the palm and the fingers." (the concise columbia encyclopedia, under "percussion instrument.")

which line(s) from the poem "spanish dancer" suggest that the dancer is using castanets?
a. "a kitchen-match darts white/flickering tongues"
b. "with the audience around her, quickened hot"
c. "like startled rattlesnakes, the long/naked arms uncoil"
d. "as if the fire were too tight/around her body, she takes and flings it out"