The answer is A. They were planning on using the slaves to dig for them
As a Jew myself, I had heard (not knowing for sure if it’s factual) that Jews who ate Kosher food did not get the Bubonic plague. Presumably, this was due to the fact that pork carried the virus of this particular plague. It also might have accounted for the fact that non-Jews were suspicious of why the Jews were not as affected.
Stone mason and concrete but their concrete that they used was one of a kind but nobody knows their recipey to make it
The difficulties they struggled with was the Bubonic plague also known as the Black Death caused by bacterium yersinia pestis and civil war.
