The correct answer is B) It ensures that the central government is strong enough to deal with major problems.
The statement that describes a major advantage of a unitary system of government over a confederal system is It ensures that the central government is strong enough to deal with major problems.
In a Confederal government, sovereign states delegate power to the central government in different issues. But as there is no strong central authority, the states can have many differences and difficulties between them, resulting in permanent conflict and inefficient procedures. In a unitary system, a strong central government controls the states gives direction and is powerful enough to solve major problems that affect the country.