Based on your readings about Bernini's 'Medusa' and Caravaggio's 'Medusa,' which of the following is true?
a) Both sculptures were created during the Renaissance period
b) Bernini's 'Medusa' is a painting while Caravaggio's 'Medusa' is a sculpture
c) Bernini's 'Medusa' depicts the mythological character with a calm expression
d) Caravaggio's 'Medusa' is known for its dramatic portrayal of the mythological character