Question: Consider a school with two periods during which classes can be scheduled. For each class, there are two variables. For example, for class A ,

Consider a school with two periods during which classes can be scheduled. For each class, there are two variables. For example, for class A, there are variables xA1 and xA2. Setting xA2=1 represents scheduling class A during period 2. Select the Boolean expression that is true if and only if class A is scheduled during exactly one of the two periods.
Consider a school with two periods during which classes can be scheduled. For each class, there are two variables. For example, for class A, there are variables xA1 and xA2. Setting xA2=1 represents scheduling class A during period 2. Select the Boolean expression that is true if and only if class A is scheduled during exactly one of the two periods.
(xA1+ xA2)(xA1xA2)
(xA1+ xA2)(xA1xA2)
(xA1+ xA2)(xA1xA2)
(xA1xA2)(xA1+ xA2)

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