The correct answer is A. Organizing Roman history into 3 main eras
Explanation:
Periodization in history refers to the process of studying and categorizing events of the past in to block of time. This process is aimed at facilitating the analysis of historical events and understanding the causes of specific historical processes. Additionally, periodization is useful as blocks of time are organized according to relatively common characteristics. Considering periodization is applied when categorizing or organizing events of the past, it can be applied to Roman history which result could be 3 main eras with common historical features. Thus, periodization is useful in the case of organizing Roman History.
I think the answer to your question is:
~People did not like John Brown only because he was an anti-slavery fighter.
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With the increase of trade a new class of people devolved made up of merchants, traders, and craft workers. these people began to form an association called guilds.
b: forts, many forts were built while heading west and provided a mostly safe and easy to defend place for traders to stop and settlers to live.