C, D and E seem defendable to me.
C: indeed, if forgery could perfectly duplicate the contour and hatching styles of a famous artist, then this would contradict the fact advanced in the passage that differences in contour and hatching styles can be used to tell forgeries apart from works of famous artists. Perhaps the "CAN" in the passage implies that this is not always possible?
D. If the painting formerly attributed to Michelangelo was ...