This would be the Strategic Defense Initiative, which was nicknamed "Star Wars".
Hope this is helpful!
I am pretty sure that it is C
I believe the answer is D. <span>It united many different European kingdoms under a shared religious culture.
When roman empire falls, the fragments of what used to be territories formed their own kingdom/Governance.
and even though the kingdoms/governance are now separated, they still held into their religious Christian traditions as some sort of guidance in their life</span>
its member bank the first one