Which statement describes a key difference between king ferdinand vii of spain and king john iv of portugal?
a. only ferdinand vii was able to prevent napoleon from conquering his country.
b. only john iv fled to the americas after napoleon attacked his country.
c. only john iv surrendered his country's american colonies to napoleon.
d. only ferdinand vii used napoleon's military strategies to form an empire in the americas.

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.

social contract theory, nearly as old as philosophy itself, is the view that persons' moral and/or political obligations are dependent upon a contract or agreement among them to form the society in which they live