If you were a supporter of slavery, you would most likely vote for Stephen A. Douglas (democratic party) in the 1858 Illinois Senate race.
To inspire people to support the allied war effort
If people knew about the cause of the bubonic plague, they would have definitely acted on it. They might have to distance themselves from various activities. People could compare the Bubonic plague and the Corona Virus because of it wide scope and it’s place of Asian origin.
Sub-Saharan Africa was experiencing an urgent medical crisis in the early 21st century with the spread of AIDS.
So the correct answer is A.
Hope this helps,
Davinia.