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Ullman (TOC) Edition 3 Exercise 1.7 Problem 1.1 (Page No. 35)

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Find in the list below the expression that is the contrapositive of $A$ $AND$ $(NOT$ $B)\rightarrow C$ $OR$ $(NOT$ $D).$

Note: the hypothesis and conclusion of the choices in the list below may have some simple logical rules applied to them, in order to simplify the expression.
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