Reading Comprehension (RC) | Exactly when in the early modern era Native Americans began exchanging

Hellovrindachopra ,

This is the statement the question is pointing to.
By the time Europeans sailing the Atlantic coast of North America first documented the fur trade, it was apparently well underway.

We have to find which out of the five statements strengthens the assertion author has made in the above statement.

Assertion : The trade was already on-going between Europeans and Americans, before the first documentation of the fur trade was done.

In strengthen
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