Collective barging refers to process of negotiating terms employment between employers and employees ( amount of salary and or working conditions )
D.
The rest seem wrong.
It could be B though
Spillover costs are Productions costs paid by the general public.
Spillover costs are also known as negative externalities. These are costs or dates shouldered by third parties due to a market transaction.
The correct answer is A. The hills forced the Inca to build terraces to farm.
Explanation
The Incas were a prehispanic civilization located in South America in the current Peruvian territory. This civilization was characterized by its innovative construction methods because they developed a method to build in the mountain chain of the Andes. Indeed, their territory was characterized by many steep hills that made it difficult to build houses, ways, and farming. But Incas used rocks to build walls to hold the soil creating flat surfaces known as terraces and these were used to grow crops, built houses, among others. According to the above, the correct answer is A. The hills forced the Inca to build terraces to farm.
