In what city did the national guard try to prevent nine black students from attending a segregated school in 1957?

Little Rock, Arkansas.

This is also from the movies, books, and other sources that you can find about the "Little Rock Nine" who faced horrible racial discrimination for simply being born black.

Hope this helped

yup! you are correct it is b.

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.