Answer:
B. <u>A marriage ended by the death of a husband or wife.</u>
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Historians use things such as primary soursces like fossials, Artifacts and documentary evidence. Evidence that a historian uses to study is the written record. Historians use data collected by governments to study what the world was like in regards to numbers and records.
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The practice of vertical integration contributed most to Andrew Carnegie's ability to form a monopoly. Vertical integration is a process of combining different stages of production such as manufacturing, supplying, distributing, retailing, etc, under the umbrella of one company.
The Compromise of 1850 was a package of five separate bills passed by the United States Congress in September 1850, which defused a four-year political confrontation between slave and free states regarding the status of territories acquired during the Mexican–American War. The compromise, drafted by Whig Senator Henry Clay of Kentucky and brokered by Clay and Democratic Senator Stephen Douglas of Illinois
I don't concur with the statement above since individuals needed to rely upon each other for specific things like water system and exchanging. Religions said things should be held together through peace. Rulers accepted to be ethically in charge of their subjects.
