Which of the following is a correct statement of the holding in In re Estate of Duke? Question 7 options: a) An unambiguous will may be reformed by clear and convincing evidence that the will contains a mistake in its expression of the testator's intent at the time the will was executed. b) An unambiguous will may not be reformed by extrinsic evidence. c) It is presumed that a testator would prefer intestacy over a residuary bequest. d) Provisions cannot be added to a will to address a situation for which the testator did not expressly provide