Answer:
B. Japan
Step-by-step explanation:
Japan is the only country in the available options in which a free market economy operates, which means that households and businesses as economic agents are the ones who make the decisions about what goods and services are produced (this is where trade- offs occur as opportunity costs), this together with market regulation in different levels by the State.
In countries such as the former Soviet Union, North Korea and Cuba, the state is responsible for planning the production of goods and services, which regulates and defines the production to which households and businesses (mostly state-owned) must stick.