Construct a Complete Truth Table for Each of the Following

Construct a complete truth table for each of the following arguments. Then, using the truth table, determine whether the argument is valid or invalid. If the argument is invalid, choose an option which presents a counterexample. (There may be other counterexamples as well.)
-A / A • ∼A

A) Valid
B) Invalid. Counterexample when A is true
C) Invalid. Counterexample when A is false
D) Invalid. Counterexamples when A is either true or false.

Correct Answer:

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