central and state governments influence each other in a unitary system. a federal system. a confederal…

central and state governments influence each other in a unitary system. a federal system. a confederal system. a democratic system.
Answer
Brief Explanations:
In a federal system, power is divided between central and state governments, and they can influence each other through various means like legislation - making, resource - sharing etc. In a unitary system, the central government has more power over states. In a confederal system, states have more power over the central body. A democratic system is a broader concept not specifically about the relationship between central and state in this context.
Answer:
B. a federal system.