If My Experimental Hypothesis Were 'Eating Cheese Before Bed Affects

If my experimental hypothesis were 'Eating cheese before bed affects the number of nightmares you have', what would the null hypothesis be?

A) Eating cheese is linearly related to the number of nightmares you have.
B) Eating cheese before bed gives you more nightmares.
C) The number of nightmares you have is not affected by eating cheese before bed.
D) Eating cheese before bed gives you fewer nightmares.