What was the original use of Zyklon B?

Under the new imperialism europe did not need large numbers of people to control territories because of

The occupies the territory between the coastal plain in the appalachian mountains. a. piedmont. b. tidewater. c. delaware valley. d. outer banks.

When this was published in early 1776, many american colonists became convinced that they should act to form a new kind of nation independent from the rule of britain's "cruel" courts