Hm, this is not an easy question.
Generally the best way to prevent a nuclear disaster is not to have any weapons, so A would be a good option. But in the modern world, complete destruction of all weapons is not feasible, and people believe that since US and Russia limited their number of weapons, this is no longer such a big concern (option D, which is I think the best. Personally, however I faviour A as a solution to the problem of nuclear weapons).
A statesman named Solon who made the laws prohibited the enslavement of debtors.
Answer:
In order to execute imperialism, it is very important to have the support of the people. The most efficient way to have and maintain the support of the people is to promote nationalism.
Explanation:
Nationalism is very different than patriotism. Patriotism can be define as the love of being from a country with respecting also the sovereignty of other nations. On the other hand, nationalism is an aggressive love for a country without considering the sovereignty of other nations. Nationalism is the key element to go to war. The leader of a nation can never go to war without practicing nationalism on his people as his political tool.