Question

what made germanys invasions of europe difficult to stop during world war ii?
○ germanys bombs and torpedoes
○ germanys powerful u-boats
○ germanys air attacks and fast-moving ground troops
○ germanys fast-moving sea attacks and powerful navy

Explanation:

Germany used the blitzkrieg (lightning war) strategy in WWII, which combined coordinated air attacks to destroy enemy defenses and fast-moving ground troops (tanks and mechanized infantry) to quickly penetrate and encircle enemy forces. This combined approach made their European invasions extremely hard to counter. The other options focus on naval assets, which were not the primary tool for their rapid land invasions of Europe.

Answer:

Germany's air attacks and fast-moving ground troops