Either Moral Questions Are Like Scientific Questions or They're Like

Multiple Choice

Either moral questions are like scientific questions or they're like questions of taste.
It's not the case that moral questions are like scientific questions.
--------------
Moral questions are like questions of taste.
The above argument is an example of:

A) modus ponens.
B) disjunctive syllogism.
C) hypothetical syllogism.
D) modus tollens.