What event allowed Hitler to consolidate his powers in March 1933?

The signing of the Enabling Act in March 1933 was a pivotal event that allowed Hitler to consolidate his power effectively. This law gave the German cabinet, and thus Hitler, the authority to enact laws without the involvement of the Reichstag (parliament). Essentially, it permitted the government to bypass parliamentary checks and balances, enabling Hitler to implement policies and measures that were crucial for establishing a totalitarian regime.

The Enabling Act followed closely on the heels of the Reichstag Fire, which had created an atmosphere of fear and urgency in Germany. The fire catalyzed the passage of the Reichstag Fire Decree, limiting civil liberties and enabling the arrest of political opponents. However, the true consolidation of power occurred with the Enabling Act itself, which was passed largely due to intimidation and the elimination of political dissent.

While other options mention events or actions that were significant in the context of Nazi Germany, such as the Reichstag Fire leading to increased political repression and the Night of Long Knives representing a purge of internal rivals, they do not directly provide the legislative framework that allowed Hitler to rule without legislative opposition. Thus, the Enabling Act stands out as the key event enabling his unchallenged authority.