The correct answer is A. If a nation has a high dependency rate, it means that the nation has a large number of children (typically under the age of 15) who are dependent on the working-age population to provide for them. This can place a strain on the economy and social welfare systems of the country, as resources must be dedicated to supporting a large number of dependents. In some cases, high dependency rates can also be associated with poverty and lower standards of living, as families struggle to provide for their children.