Consider the following dialogue: Hokey: I know that I will go to Heaven when I die.Pokey: How do you know that?Hokey: Because my cleric tells me that I will.Pokey: How do you know that what your cleric says is true?Hokey: Because the Holy Book tells me that everything my cleric says is true.Pokey: How do you know that what your Holy Book says is true?Hokey: Because my cleric told me that everything the Holy Book says is true. In this dialogue, Hokey is
选项：

A: begging the question.
B: equivocating.
C: sliding down a slippery slope.
D: All of the above.
E: None of the above.