Southern Secession is the event or issue that historians can gain.
The best answer is the following one;
tried to force people to improve their morals.
The prohibition tried to make people stop drinking alcohol, which can be seen as "noble". People did not decide it themselves but it was forced on them, so it is justified to say that the law during the Prohibition time tried to force people to improve their morals.
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Answer: A. Black Bean Episode
Explanation:
An aftermath of the Mier Expedition.
