Which statement describes the start of ww1
a: germany invaded the balkans and russia took control of austria, leading to a declaration of war.
b: the assassination of archduke franz ferdinand set off a chain of events among european alliances that led to war.
c: great britain and germany met to divide up the balkans, but could not resolve their differences and went to war.
d: archduke ferdinand ordered an invasion of france, and great britain declared war in france's defense.

the answer is B

The first world war began in August 1914. It was directly triggered by the assassination of the Austrian archduke, Franz Ferdinand and his wife, on 28th June 1914 by Bosnian revolutionary, Gavrilo Princip. This event was, however, simply the trigger that set off declarations of war.

so they can differentiate themselves from others as they saw themselves as the superior race. the star was basically a symbol that meant you are a less of a person than i am because of my race. the star was also degrading for those who had to wear it because they were aware of this and the nazis used the notion to make them feel less like a person.