<span>b. the assassination of Archduke Franz Ferdinand and his wife, Sophie</span>
Answer:
C. they could own slaves
Explanation:
Mexico's rule of Texas abolished slavery and therefore African-Americans could not own slaves.
The answer is definitely A.
<span>Hello! Popular Sovereignty was a policy that stated that the power to decide about the slavery question was concentred in the hands of the states, and not in the Congress rulers. So, in that way, the answer is b) voters in a territory should decide whether or not to allow slavery in that territory.</span>