Answer:
A: They were independent of one another.
Explanation:
Contrary to popular belief, the Maya were not a single people, but several peoples (ethnicities) who had the same linguistic and cultural origin, and inhabited Mesoamerica.
Answer:Sinking of American merchant ships
Explanation:In early 1917 Berlin forced the issue. Its declared decision on 31 January 1917 to target neutral shipping in a designated war-zone became the immediate cause of the entry of the United States into the war.
He was the first U.S president to ever establish a relationship with China
Were built around a common is the correct answer I believe.
