1. which of the following stretches from southern mongolia toward the huang river in china?
the gobi desert
the himalayas
the north china plain
the tibetan plateau
2. which of the following places would most likely have hot, humid summers and mild winters?
mongolia
northern china
taiwan
tibet
3. which factor most contributes to variation in population distribution in china, mongolia, and taiwan?
large chinese cities have millions of residents.
mountain ranges make much of the region too dry to farm.
mongolia is landlocked, and taiwan is an island.
china expanded its long-age empire to include many regions.
4. why does the one-child policy most likely affect only han chinese?
members of other ethnic groups have different religious beliefs.
the han live mostly in the densely populated east.
only the han agreed that the policy was necessary.
other ethnic groups need a higher birth rate to survive.

marginal cost is a microeconomic measure that us to evaluate the extent to which the level of production of a good is sustainable in accounting, that is, to how many quantities the company plans to profit from the production of the good.

the concept of marginal cost is simple, it means the cost of producing one more item. for example, in the case of pies, the marginal cost is the cost of producing one more pie than those that have already been produced.

it is important to understand that productive activity influences marginal cost. the marginal cost of some goods can be very high, while others may be insignificant. for example, the marginal cost of producing an extra plane is very high. already the marginal cost of a water company to provide 1l more water is derisory.

in the case of pies, the cost involves the inputs, the labor and the fixed cost, which involves the fixed space of the bakery. the level of production initially has the marginal cost decreasing because there is space and manpower available. however, to produce more you have to hire more workers and buy more inputs. if physical space is limited, workers will conflict with places, inputs and their productivity will decrease, meaning there is an optimum point of production for each level of space and manpower. from this point on, the productivity of the workers will be getting smaller because of lack of space, so that the marginal cost of producing one more pie will be increasing. so, although you have not posted the chart, but if you have the answer, you can see that my explanation goes according to the marginal cost curve that will increase from the 4th pie, answer (c).