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Answer:
c) Parliamentary
Explanation:
Multiple political parties tend to be the most common in parliamentary systems. In these kinds of systems, several political parties compete with their chance of government forming.
Examples of countries that have multi-party systems are France, Germany, Mexico, Sweden, Serbia, Romania, Switzerland.
The correct answer is: "He developed mathematical principles"
René Descartes (1596 – 1650) was a French philosopher, mathematician, and scientist who lived more than 20 years in the Dutch Republic and was one of the main figures of the Dutch Golden Age.
His great influence in mathematics has been his major contribution to the Scientific Revolution, although his work in philosophy is outstanding too. He developed the the Cartesian system of coordinates. He is considered the father of analytical geometry, which connects both algebra and geometry and which has been used in the development of infinitesimal analysis and calculus .
Islam ruled North Africa by A.D. 700.
