First of all, you dont have the answers.
But the answer is "Companies replaced hand-operated brakes with air brakes on trains" is the best answer because this stopped many of the fatalities that were caused by brake failures." which is I say on what you are using D
The national government makes all laws for the citizens
describes unitary system.
Option C
<u>Explanation</u>:
A unitary government is best described as a government where the powers reside in the central government, this is different from a federal state. In this unitary government , the central government have the power to give instructions to the sub-national states and sends implantation polices to them.
There a lot of nation states that are based on the form called unitary government, this includes The Great Britain, France e,t,c. All states have a unified system of government with bicameral legislation except Nebraska which has a unicameral from of legislation, in ultimatum all local government are subject to the central authority.
Answer:
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