In which era did "Drummers" and credit investigators represent manufacturers on the east coast, but were viewed with skepticism? a) era of production Ob) pioneer era O c) era of scarcity O d) era of the "Roaring 20s"

In which era did "Drummers" and credit investigators represent manufacturers on the east coast, but were viewed with skepticism? a) era of production b) pioneer era c) era of scarcity d) era of the "Roaring 20s