C) In a unitary system, the central government has more power than in a federal system.
If you are going to ask multiple choice questions, label them.
It was important in the development of astronomy and science because it was the first model that aimed to predict how the planets move in their orbits. Despite being a complicated mix of circles and epicycles it was not a bad model and it worked well for at least 1500 years until observations became accurate enough to show its imperfections
