Uli Went to Donnie's House Party with the Intention of Getting

Uli went to Donnie's house party with the intention of getting drunk,so he brought alcohol with him.Upon arriving,he realized Donnie was supplying free drinks,so he didn't have to drink the alcohol he brought.On his last drink of the night,Walter drugs his drink.As he is leaving,Uli falls down a set of stairs.Uli feels that Donnie and Walter are both liable for causing him to fall down the stairs.Which of the following is true?

A) Uli is correct.Donnie is liable for supplying him with alcohol and Walter is liable for drugging his drink.
B) Only Donnie is liable because the but-for test will prove that he would have fallen down the stairs because of the alcohol even if his drink weren't spiked.
C) Only Walter is liable because the spiking of the drink is the most directly causal action.
D) Neither are liable because Uli had the intention to be drunk,so the result would have been the same.
E) Donnie is only 30% liable and Walter is 70% liable because of joint and severable liability.