4.) How long was the Middle Passage?

the journey became more efficient over the centuries; while an average transatlantic journey of the 16th century less discover month, by the nineteenth-century The Crossing often require fewer than six weeks

Explanation:

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discovery of cape town-portuguese empire

development of africans language-dutch east india company

introduction of railway-british empire

a historian researching the immigration policies of the early 1900s would expect a source written today,rather than in 1910 to :

( a ) be more interested in objective data and statistics.