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digital electronics boolean algebra and logic simplification
1. The commutative law of addition and multiplication indicates that:
(A): an expression can be expanded by multiplying term by term just the same as in ordinary algebra
(B): the factoring of Boolean expressions requires the multiplication of product terms that contain like variables
(C): the way we OR or AND two variables is unimportant because the result is the same
(D): we can group variables in an AND or in an OR any way we want
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