Answer:
B. created two territories that would use popular sovereignty to decide the slavery issue.
Explanation:
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Japan used to be an isolated country as it's borders were closed to everyone. After they opened the borders, they started developing the country by accepting new technologies and anything similar that was considered to be beneficial for the country's well being. They also started to perfect things that they adopted which led to new inventions and advancements.
The main reason why the Boers and the British fought over Southern Africa was because large deposits of gold had been found in the region, and the Boers did not want the British to rule over the area and claim the riches.
This is an example of sexual reproduction since the pollen fertilizes the SEX cells of a female tree. The key word is sex cells which implies sexual reproduction