Magellan was NOT murdered for trying to enslave natives. He was killed during a battle.
So B, C, and I'm pretty sure D, are correct.
The answer to your question is D. It establishes. Hope this helps!
The immediate cause of World War I that made the aforementioned items come into play (alliances, imperialism, militarism, nationalism) was the assassination of Archduke Franz Ferdinand of Austria-Hungary. In June 1914, a Serbian-nationalist terrorist group called the Black Hand sent groups to assassinate the Archduke.
It’s on google
Selma: The Bridge to the Ballot is the story of a courageous group of Alabama students and teachers who, along with other activists, fought a nonviolent battle to win voting rights for African Americans in the South. Standing in their way, a century of Jim Crow, a resistant and segregationist state, and a federal government slow to fully embrace equality. By organizing and marching bravely in the face of intimidation, violence, arrest and even murder, these change-makers achieved one of the most significant victories of the civil rights era.
All organized communities have government, leadership, form of currency or trade, and citizens, etc. Hope this helps.