What is the "time of great change" called

The correct answer is Progressive Era.

Explanation:

During the 19th century it happened that in the United States big businessmen and factories made a lot of money, while the population of workers did not have a good income while they had to work hard and in poor conditions.

This led to the emergence of unions that were fighting for workers' rights and fair pay for their jobs.

This caused many changes in the way of working in the United States, achieving fair hours and pay for all employees.

This "time of great changes" was called the progressive era.

what are local authorities doing to fix the problem

explanation:

when a country suffers, for example, a drought period, the market product is affected for a low offer, in this case, potatoes; the government has to tax to the households, which have to give more money for the potatoes which they consume, that situation make them consume substitute goods even through loans, it could increase the financial market movement and the inflationary phenomena, the business has to increase salaries in order to the employees could buy a more expensive food (potatoes) and in order to inflation tha business had to buy expensive supplies in the factor market, while the rest of the world have to gain more money to consume the same amount of potatoes.