Which of the Following Commits the Slippery Slope Fallacy

Which of the following commits the slippery slope fallacy?

A) The weather forecast says that it will rain tomorrow, and if it rains, the road will be wet.Therefore, I will need to drive carefully tomorrow.
B) The disease started with one patient, who then infected others, and now the disease has become an epidemic.
C) If Lassie is a dog, and dogs are mammals, and mammals are animals, then Lassie is an animal.
D) Banning obscenity will lead to banning all speech that offends anyone, which will lead to banning political speech.So we shouldn't ban obscenity.
E) Eating a pound of chocolate will increase my calorie intake for the day, and that will lead to putting on more weight.So I shouldn't eat the pound of chocolate.