If Japanese workers are more productive than French workers, then trade between Japan and France

A) can take place only if France has an absolute advantage in producing a good or service Japanese buyers want.
B) cannot take place because Japanese goods and services will be less expensive than French goods and services.
C) cannot take place until French workers become more productive.
D) will take place so long as each country has a comparative advantage in a good or service that buyers in the other country want.