Which would be the least popular merchandise at chouteau’s trading post? beaver pelts gunpowder beaded necklaces lace scarfs

The least popular items at Chouteau's Trading Post would be the lace scarfs. The trading post was stablished in the first half of the 19th century by the Chouteau family, and became a successful fur trading business between American/European settlers and Native American tribes in the region (Kansas, Missouri). Since it was a trading business (connected with the local natives), gunpowder, hunting supplies and pelts (and even beaded necklaces) would certainly be much more popular than lace scarfs.

there were abundant sources of fuel nearby

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