Answer:
B) building up the German military.
Explanation:
One of Hitler's strategies to improve the economy of Germany was building up the German military which had been greatly damaged and diminished after WWI. Although the process was started right after the signing of the Treaty of Versailles, it was massively expanded with the rise of the Nazi Party. The process was secretive for most of its time, until it became known right before WWII. This increase of military capacity allowed Germany to confidently begin the attacks and invasions that would precipitate WWII.
