Answer:
Travel across the US became much faster
Drivers could reach other cities quickly.
They introduced a Hindu religion not a monotheistic so. B.) a monotheistic religion
Steel production decreased after ww2
Due to the deaths of most of the population, "ordinary farm workers, who had been forced into serfdom previously, shot up by 50%. More bullion among a smaller population meant more wealth across all classes and because the same land was in use and it was now plentiful, it resulted in technological advances as well." - Hank Campbell (found at Science20.com)
About a third of the clergy fell to the Black Death, making answer a. unlikely.
I never found any information stating Peasants migrated into cities for medical care, making answer b. unlikely.
Lower classes benefited from the Black Death economically, therefore c. is my final answer.
Doctors at this time knew nothing about how to cure disease, they also made little to none advancements. Answer d. is very wrong.
I think the answer would be true. Cultural bonds like people who share the same religion are an example of what makes up a formal region. Religion is a trait of a culture and mostly people following the same culture or traditions would have the same religion and would live in the same area making up a region.
