Use Indirect Truth Tables to Determine Whether Each of the Following

use indirect truth tables to determine whether each of the following arguments is valid. If the argument is invalid, choose an option which presents a counterexample. (There may be other counterexamples as well.)
-(A ≡ B) • (A $\lor$ C)
C / B

A) Valid
B) Invalid. Counterexample when A and C are true and B is false
C) Invalid. Counterexample when A is true and B and C are false
D) Invalid. Counterexample when C is true and A and B are false
E) Invalid. Counterexample when A, B, and C are false

Correct Answer:

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