What was the large movement of pioneers going west across the Oregon Trail called?
A
the Oxen Train
B
the Great Escape
C
the Westward Tide
D
the Great Emigration

It effectively opened the floodgates of pioneer migration along the Oregon Trail and became known as the Great Emigration of 1843.

The Great Emigration

Explanation:

It tells on the first paragraph of the story: "Westward migration really got going with the Great Emigration of 1843".

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