Which of the following hitler and other nazi leaders make it easier to carry out the holocaust?

they carefully explained to the german people their plans for extermination.
they promised equal rights for all germans for most of the 1930s.
they made anti-semitism an everyday part of life in germany.
they opened up the extermination camps to inspection by the german public.

They made anti-Semitism an everyday part of life in Germany.

Reasoning:

The idea that Jewish communities were responsible for a bad economic situation in most of Europan societies was present in the years previous to the rise of National Socialism. When the fascim settled in Germany, Gobbels  (Ministry of Public Enlightenment and Propaganda)promoted more radical propaganda that lead to the horrors we study in History.

-The society was to normalize this violence since the process began slow when small measures such as use of radio inciting anti semitism , and daily broadcasts in the news would point to Jews as the source of problems in domestic affairs.

-In the arts , some representations also make a phenotype believe the formation of an Aryan man, who was deemed superior. Males were always required to be physically perfect.

When all this became everyday life, the normalization of violence took place. (The notion that there is no wrong doing in violent acts, and as well the justification for carryiong out state crimes).

when he becomes king