Reactions in Zeolite catalyst depend on, 

a)Pores 

b)Apertures 

c)Size of cavity 

• Zeolite is a shape selective catalyst. They are used depending on the size and shape of the reactant and product molecules. And they can only trap selective species depending on the pore size. 
• Zeolites have a honeycomb-like structure thus increasing the surface area of the catalyst. They are also used as ion-exchange beds.

Hence, zeolite catalysts depend on all the given factors. 

Therefore, option (D) is correct.