Answer:
The correct answer is D)It caused people to move out of towns and cities to look for work
People did not do this because all of Europe was affected by the black plague except for the Duchy of Milan and Poland, and these two regions were obviously quarantined and kept everyone else out.
In some cities up to 70% of people died and therefore, their economies were destroyed. This is not an eviroment that is attractive for immigration.
The black plague in fact, helped improve economic conditions, but in the countryside. As there were less people than before in the same amount of land, wages rose and land ownership became more common.
