After Rising to the Position of Chancellor of Germany, How

After rising to the position of Chancellor of Germany, how long did it take Hitler to transform Germany into a National Socialist dictatorship?

A) Germany never really became a National Socialist dictatorship.
B) Through skillful manipulation of "useful idiots," Hitler achieved dictatorial power in five years.
C) He accomplished the transformation in about eight weeks using constitutional procedures.
D) Hitler was able to gradually increase his political power over a period of about two years.
E) Germany already was a dictatorship so it only took a few days to put the Socialist stamp on things.