I want to ask a question which is not clear for me. In an exam, we were given such a question that it says which of the following dialogues doesnt have ellipsis. Two most possible answers are these below. According to test department the answer is B. But A option doesn't include any ellipsis as well. It has substitution, isn't it? Any ideas on this topic?
A) X: You tasted it before, didn't you? Y: I don't think so.
B) A: I think they're not doing well. B: It is not as bad as you think