I don't know the answer choices but I do know that scarcity is a lack of a certain resource. This resource, which there is not a lot of, then costs more. The less there is of something, the harder it is going to be to get it.
(D) swahili .....................................................................
Answer:
The middle class expanded as a result of industrialization.
It introduced a successful labor model in which employees were housed near the factories where all steps of manufacturing were completed
