Two government structures that can exist in the republic are the parliamentary structure and the presidential structure. Thus option C and D is the correct answer.
In a parliamentary structure of government, a country will be ruled by the head namely as president. All the decision making will be done based on the welfare of the society.
Nationwide elections will be used to directly elect the president. The presidential form of administration is built on the idea that the three branches of government should have independent authority.
Therefore, option C and D parliamentary structure and presidential structure is the appropriate answer.
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