"Regarding the Jewish Question, the Führer is determined to clear the table. He warned the Jews that if they were to cause another world war, it would lead to their own destruction. Those were not empty words. Now the world war has come. The destruction of the Jews must be its necessary consequence. We cannot be sentimental about it. It is not for us to feel sympathy for the Jews. We should have sympathy rather with our own German people. If the German people have to sacrifice 160,000 victims in yet another campaign in the east, then those responsible for this bloody conflict will have to pay for it with their lives."

--Joseph Goebbels, 1941
In this diary entry from 1941, Joseph Goebbels expresses his belief that one of the motivating factors behind the Holocaust was that
A) European Jews were responsible for causing the Second World War.
B) the Jews controlled the political and economic structure of Europe.
C) the Jews were regarded as an inferior race and were "polluting" Germany.
D) the Jews were responsible for the economic depression that plagued Germany throughout the 1930s.

I believe its A after reading the statement above I understood what the writer was saying the Germans were angry at the Jews and blamed the war on them which is why they targeted them they blamed the Jews for all the world's problems and decided to exterminate them using "the final solution"

Explanation: I hope this helps!

a countries leader should be motivated by the common good of the country.

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.