Hitler was appointed Reich Chancellor in 1933.

“Became Chancellor” here means: was appointed.

Precise wording helps avoid a common confusion. Hitler was not directly elected Chancellor by the people. Hindenburg gave him the office. The Nazi Party had previously achieved electoral successes, but those and the appointment were different events.

The office gave Hitler a decisive position of power. In the following months, the Nazis destroyed democratic rights and mechanisms of accountability. The year 1933 therefore connects the appointment with the beginning of Nazi dictatorship without compressing every later step into one day.

The other three answers

The incorrect years fall before or after the appointment.

Appointment and the destruction of democracy are connected.

Appointment alone does not explain every step in consolidating power. Fundamental rights were suspended in February; the Enabling Act of March 1933 removed essential parliamentary checks. Violence and persecution accompanied this process.

Receiving a state office does not establish democratic legitimacy for every subsequent action. Historical understanding requires attention both to how power was obtained and to the democratic safeguards then dismantled.