Can someone please answer this! ASAP

B Europeans were highly susceptible to african diseases.

Disclosure

This is not meant to be offensive of racially insensitive please do not mark as inappropriate.

4 copper and gold, the california gold rush is why im pretty sure.

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.