What conclusion can you draw about the level of economic development in a country in which most workers are in the tertiary and quaternary sectors of the economy?
The level of economic development in such a country is probably increasing rapidly.
Countries in which most workers are in these sectors typically have a high level of economic development.
Countries in which most workers are in these sectors typically have a low level of economic development.
The level of economic development in such a country is probably in steep decline.