What statement describes a major advantage of a unitary system of government over a confederal system

It ensures that the central government is strong enough to deal with major problems.  

C. It ensures that the central government is strong enough to deal with major problems.

Explanation:

In the Unitary government, the power is held by one central authority while in a federal government the power is between different layers of government such as states and local government, both forms of government have some advantages and some disadvantages. In the federal government, the national rule overrides the state rules, and there are multiple hierarchy levels with a central authority and the states both are sovereign. While in unitary government there is no hierarchy of sovereign powers and the states have no authority for passing their laws. The central government can order the state to do anything, the central government is more powerful in the Unitary system.

a standing committee

explanation:

“a committee reviews the bill and marks it up to make it more viable and to reflect interests