Rudy : This enzyme helps our body digest the food

Alim : oh ya, I don’t get it

Rudi : ………………………..

Alim : well, I am not sure that I know what you mean

Rudy : Do you want to repeat it?

Alim : Yes, please

The best answer to complete the dialog is …

A. Do I bother you?

B. Can you tell me once again?

C. Where do you want to go?

D. Do you know what I’m talking about?