The black death killed over one third population how did this affect medieval europe

The Black Death is estimated to have killed 30 to 60% of Europe's total population. In total, the plague may have reduced the world population from an estimated 450 million down to 350 to 375 million in the 14th century. The plague recurred as outbreaks in Europe until the 19th century.

it killed more than one-third of the population.

Explanation:

trust me I took the test this is the right answer.  

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.

this is false

richard nixon was the 37th president of the united state and didn't serve as a vice president for any president before him