The word "squeak" means ________.

A．The thirty-foot-long pipe was not a straight one.
B．There were no big bends in the solid stone.
C．Solid stone had to be put into the pipe.
D．In one place the workmen had to put big bends into some new wiring.

A．Business and People
B．Business Goes Green
C．Shopping Habits Are Changing
D．Supermarkets and Green Products