During World War I, the Ku Klux Klan skyrocketed in popularity across America. How did the war encourage Americans to join a group that practiced discrimination?

The reason is that there were more black people left behind so the animosity began to climb.

Explanation:

The time of the war was one in which many young Americans were dying and it was also when the south had been radicalized against the blacks and had begun to blame them.

This was also because of the low number of drafts  from that part of the country.

So, the Klan took advantage of the public opinion and drastically increased its numbers and in the frenzy of the war people began to join.

the crusades are one of the most significant events in the history of europe and the middle east.   they were a series of religious wars carried out by christian crusaders from europe during the timeframe of the middle ages.   beginning in 1095 ce, the crusades saw european knights and noblemen travel to the middle east in an attempt to capture the holy land away from muslim people that had controlled the region for the previous centuries.   the term crusade means ‘cross’.   therefore, the europeans that became crusaders viewed themselves as ‘taking up the cross’.   in fact, many of the crusaders wore crosses on their clothing and armor as they made their pilgrimage to the holy land.

explanation:

the answer is a. laws were enacted in the aftermath of the plot to make it harder to free slaves,increasing sectionalism