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．life history on Earth
B．animals and plants in the world
C．disappearances of animals and plants in Australia
D．discoveries of new animals and plants in Australia