Option A is an example of a check on the power of the legislatibe branch of the constitution. The president can veto a legislation thanks to the existence of Checks and Balances, which funtion is to make sure no one branch would be able to control too much power, that is that this system limits the power of the three branches devided by the constitution: Legislative, executive and judicial. In this case the executive (President) is limiting the legislative power (Congress)
Answer:
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a form of government with a monarch at the head.
Explanation:
