1: You can change the hypothesis if the experiment is not supporting it.
2: They do not use scientific method.
Answer: it result in high dependency ratio.
Explanation:
Ageing population is a kind of population with a high number of old people than young people in the country. it can be a problem because it can lead to a high dependency ratio in which the number of the working population will be lower than the number of people who depend on the working population. when a country has a lesser number of people that are working it has a greater economic consequences for such a country such as decrease in production, reduction in the number of tax payers.
<span>During McKinley's presidency, the United States proved its prowess as the war with Spain, a strong European power, was fought and won. As a result, America gained overseas territories and influence in Asia, and then the President tried to normalize trade with China when he issued his "Open Door Policy." Hawaii, which eventually became the 50th<span> U.S. state, was annexed in 1900. During this period the United States established itself as a world power. Some historians believe that one thing President McKinley did for the nation was inadvertent when he made the decision to pick Theodore Roosevelt as his running mate for the 1900 election, and as a consequence, bequeathed the presidency and the welfare of the country to him</span>
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