Which of the following is the most likely reason why africa has such a low life expectancy rate compared to almost everywhere else?

The answer is A. The spread of the AIDS virus.

it would be  

germany had to pay all damages related to the war.

and i think

germany had to take sole responsibility for the 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.