All of these choices are correct.
To gain the support of the German public, Adolf Hitler and the Nazi Party employed a variety of tactics, including propaganda, public works programs, and public events such as parades and speeches. Hitler and the Nazis used propaganda to promote their ideas and to demonize their opponents, and they implemented public works programs to decrease unemployment and improve the economy. They also used public events, such as parades and speeches, to excite and rally the people behind their cause. These tactics were effective in helping Hitler and the Nazi Party gain widespread support in Germany.