The adjective <em>sadistic </em>has to do with taking pleasure from causing pain, suffering or humiliation on others. Since it is not suitable to describe a dog as <em>sadistic</em>, the adjective can be replaced by other terms like savage, cruel and barbarous. In that respect, a savage dog refers to a fierce, violent and uncontrolled animal.
A is wrong because it’s a statement. B is the answer because it asks “why haven’t you” & that’s the example. C is another statement D is a demand, not a bandwagon fallacy