What do you know about supply and demand?

A.
A lot

B.
A little bit

C.
Nothing

It depends on the specific context and level of knowledge the person has. Some people may have a lot of knowledge about supply and demand, understanding its basic principles, theories, and applications in economics. Others may only have a basic understanding or have heard a little bit about it. There are also individuals who may not have any knowledge or understanding about supply and demand.