C. Other countries wanted to industrialize like Britain.
While it was true that western lands were somewhat more fertile than the now-depleted lands of the East, many of the pioneers were attracted to the frontier in order to speculate in land, i.e. to purchase large quantities of cheap government land and to sell it at a profit to later comers
Both mobilizations were important, but the industrial one seems to have greater weight, since this influences the population in general, and the military affected only where a conflict developed, it mobilized all available resources to obtain the highest military capacity in a specific area, but the industrial one had the capacity to produce what was necessary for war, as a fundamental and determining element in the outcome.
The Agrarian Era is one of the most important points in the human history and development. In this era, the humans changed their lifestyle from nomadic to settled one because they were able to produce surplus of food. This resulted in great and rapid development and progress of the human societies. As the humans had much more spare time, they started to occupy themselves with lot of other things, such as science, arts, building, resulting in an explosion of inventions and advancements in a very short period of time, and the process was constantly accelerating and the human kind was moving forward quicker and quicker.