Which of the following contributed the most to the Ottoman Empire successful expansion in Europe and the Middle East in the period from 1450 to 1600?

Explanation:mleieha and muweilah

checks and balances are needed to keep the government running smoothly, they allow the three branches of government to overrule one another so that one branch of government does not become too powerful.

- three-quarters or two-thirds..

- "the constitution provides that an amendment may be proposed either by the congress with a two-thirds majority vote in both the house of representatives and the senate or by a constitutional convention called for by two-thirds of the state legislatures."

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