Use a Truth Table to Answer the Following Question $$\frac { M \cdot U } { M \vee U }$$

Multiple Choice

Use a truth table to answer the following question.Which, if any, set of truth values assigned to the atomic sentences shows that the following argument is invalid? $$\frac { M \cdot U } { M \vee U }$$

A) M: T U: T
B) M: T U: F
C) M: F U: T
D) M: F U: F
E) None-the argument is valid.