What Is the Implied Premise in the Following Moral Argument

Multiple Choice

What is the implied premise in the following moral argument?
Argument: The war did not increase the amount of happiness in the world.So the war was morally wrong.

A) If a war is immoral,it must be considered morally wrong.
B) If a war does not increase the amount of peace in the world,it must be considered morally wrong.
C) If a war does not increase the amount of happiness in the world,it must be considered morally wrong.
D) Some wars increase the amount of happiness in the world.