Determine if the following argument is valid or invalid.

If Mr$.$ Lapell is a CEO, then he lives in Boston. He lives in Boston and his first name is Frank. Therefore, if his first name is not Frank, then he is not a CEO

Choose the correct answer below.

A$.$ The argument is invalid because when a truth table is set up for the conjunction of all the premises implying the conclusion, the final column contains all Fs$.$

B$.$ The argument is valid because when a truth table is set up$,$ or ine conjunction of all the premises implying the conclusion, the final column contains all $T\text{'}$s$.$

C$.$ The argument is invalid because when a truth table is set up for the conjunction of all the premises implying the conclusion, the final column contains mostly $T\text{'}$s but there is one $F.$

D$.$ The argument is valid because when a truth table is set up for the conjunction of all the premises implying the conclusion, the final column contains an F but mostly Ts$.$