Evaluate the following categorical argument.
P1: All Terriers are dogs.
P2: All Terriers are mammals.
P3: All dogs are mammals.
a. No answer options are correct.
b. Valid because it's true that all Terriers are mammals.
c. Valid because it's true that all Terriers are dogs
d. All answer options are correct.
e. Valid because it's true that all dogs are mammals.