Is the following argument form valid or invalid? p q r ~q ~r ~p ~r Which column or columns represent the premises? (Select all that apply.) p q r ~q ~r ~p ~r Which column represents the conclusion? p q r ~q ~r ~p ~r Which of the following answers the question? The argument is valid because all truth table rows that have true premises have false conclusions. The argument is valid because all truth table rows that have true premises have true conclusions. The argument is valid because all truth table rows that have false premises have false conclusions. The argument is invalid because there is a row in the truth table that has true premises and a false conclusion. The argument is invalid because there is a row in the truth table that has false premises and a true conclusion