Why Might a Government in a Unitary System Be Less

Why might a government in a unitary system be less concerned about the courts than a government in a federal system?

A) In a unitary system the courts can strike down laws, but in a federal system they can also give power to regional governments.
B) In a federal system the courts can strike down laws, but in a unitary system they can also give power to regional governments
C) In a unitary system the national government appoints Supreme Court Judges, but in a federal system the regional governments make the appointments.
D) Courts general tend to be more favourable towards the less powerful party. In a federal system this often means courts support the regional governments.