Being the explorer with all his maps and fleeting
It was first proposed in the mid 1850s by doctor Ignaz Semmelweis who believed it would reduce mortality rates. It became a widespread thing around 1900 when everyone started doing it because they realized how important decontamination was.
The Songhai Empire (also transliterated as Songhay) was a state that dominated the western Sahel in the 15th and 16th century. At its peak, it was one of the largest states in African history. The state is known by its historiographical name, derived from its leading ethnic group and ruling elite, the Songhai. Sonni Ali established Gao
as the capital of the empire, although a Songhai state had existed in
and around Gao since the 11th century. Other important cities in the
empire were Timbuktu and Djenné, conquered in 1468 and 1475 respectively, where urban-centered trade flourished. Initially, the empire was ruled by the Sonni dynasty (c. 1464–1493), but it was later replaced by the Askiya dynasty (1493–1591).
D he had a throat infection
The communal system that John Smith abolished at Jamestown that saved him from destruction is common-store system.
The common-store system was a system where each person was required to place the food of his labor in a common storehouse.
In the common-store system, the food taken by the community was then distributed equally. This was bad for the colonists as many of the people decided not to work since they knew they will still get the proceeds from the labor of other people. This led to food shortages. The system was eventually stopped by John Smith.
In conclusion, the correct option is the common-store system.
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