During the second stage, if the family wanted to consume new goods and services, they had to enter the marketplace ______.

A．some traditional goods and services were not successful when provided by the home economy
B．the market economy provided new goods and services never produced by the home economy
C．producing traditional goods at home became socially unacceptable
D．the question of. whether new goods and services were produced by the home economy became irrelevant

A．be polite but honest to foreigners
B．learn customs of different countries
C．decide whether to be polite according to different cultures
D．tell more truths to Americans than to people from other countries