If the manager lowered the price as the salesman suggests, what would the final price be

A．Musical instruments developed through the years will sooner or later be replaced by computers.
B．Music cannot be passed on to future generations unless it is recorded.
C．Folk songs cannot be spread far unless they are printed on music sheets.
D．The development of music culture is highly dependent on its material aspect.

A. Mainland America is situated in the north of North America.
B. The United States consists of 51 states, and two of the 51 states are separated from the continental United States.
C. The United States is mainly situated in the northern temperate zone.
D. The Mississippi River is the second largest but most important river in the United States.