Determine whether the following argument is valid or invalid? Argument: If a number is divisible by 2, then it is even. The number 4 is divisible by 2. Therefore, the number 4 is even.

A. The argument is valid by the Law of Syllogism.

B. The argument is valid by the Law of Detachment.

C. The argument is not valid.

D. The argument is valid but does not follow the Law of Syllogism nor the Law of Detachment.