Despite the fact that the Black Death was widespread and deadly, it seemed that some Europeans were immune to it.
it was not understood how it started or how it spread.
it did not affect most countries in western Europe.
it seemed that many doctors did not attempt to treat it.
Brainliest for best answer.

Your answer for this question would be B. it was not understood how it started or how it spread.

Explanation:

Apologies for the late answer but hopefully this will help someone! I took the test for this as well and B was the right answer ^^

a and b because with the other three, they simplify to something else.