PART a If Champagne Contains Alcohol, Then Minors Should Avoid

Short Answer

PART A If champagne contains alcohol, then minors should avoid it, so champagne contains alcohol, because minors should avoid it.
The form of this argument is: PART B
Which of the following substitutions proves the argument invalid?
A) C = Napoleon was killed in a plane crash, M = Napoleon is alive.
B) C = cats, M = mammals.
C) C = Albert was killed in a car accident; M = Albert is dead.
D) C = cats, A = dogs, M = mammals.
E) C = Benjamin Franklin was killed in a plane crash; M = Benjamin Franklin is dead.