What group of people is this poster aimed at ? A. Mothers
B. Young men
C. The elderly

young men!

Explanation:

We want you! is talking about wanting people to join the American army and military units, and given that elderly might not be able to perform that well in general with mobility let alone running, shooting, etc. And Mothers have children to look after, so young men would be the viable option for recruits out of the options or just in general.

Explanation:

ating and exploiting the land for all it was worthcame about because the expansionary energy of the U.S. had Finally encountered a voluble, marginal land, destroying the delicate ecological balance that had evolved thereHurt ExcerptDust storms in the southern Great Plains, and indeed, in the Plains as a whole, were not unique to the 1930sMany factors contributed to the creation of the Dust Bowl – soils subject to wind erosion, drought which killed the soil-holding vegetation, the incessant wind, and technological improvements which facilitated the rapid breaking of the native sod