The answers are (the silk road) (saratoga)(parliament- in pretty sure)
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.
ITS THE 3RD ONE BRO BC THE OTHER ONES JUST DON'T MAKE ANY SENSE