-----Could you break a 20-dollar bill for me?  -----___________. 
A、Ok, how much is it?  
B、How can I help you, Miss?
C、Sure. How do you want it?
D、I thought you were well-off.

A．the consumer can rank all possible consumption bundles.
B．all preferences conditions are met.
C．the consumers can rank all affordable consumption bundles.
D．more of a good is always better.