The use of trams during the second industrial revolution changed the standard of living in which of the following ways

The tram is a means of passenger transport that circulates on rails and on the surface in urban areas, on the streets themselves, often without separation from the rest of the traffic, without a track or a reserved area.

The tram had a considerable development between the beginning of the 20th century and the interwar period with the innovation of electric traction, the multiplication of the lines and the increase in the number of passengers, becoming the main urban transport. The transport by horse had disappeared practically of all the European and American cities around 1910, and the buses still were in phase of development, increasing their mechanical reliability, but still they did not surpass the tram in benefits, whereas the automobile was still (for little time) reserved for a limited clientele. A great benefit of this type of means of transport was Improvement in the concession of economic centers with urban centers and residential areas.

answer; when one group has an extremely high score at pretest;

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).