I would say the <span>military-industrial complex</span>
Because the United States struggled to Unite and quell the rebellion, the answer is B. The United States realized it needed to be more centralized in order to deal with internal and external threats.
To avoid wars in the future
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>
<span>The location where Christians began to
organize the crusade against Constantinople is Venice. The Crusades were a
progression of religious wars among Christians and Muslims. <span>In
1182, madden people of Constantinople had assaulted the Venetians in
Constantinople. The Venetians in this way had an explanation behind craving
revenge.</span></span>
