I need help on this one question please

b

Explanation:

As Vikings began to invade Europe, Kings and nobles needed to protect their land from attacks, for fear they might get pillaged and plundered.

So the nobles began raising armies to protect their property, and power was passed from the kings to the nobles.

Explanation: therefore it's either A or B.

(More likely B I think)

I'm not sure which, but I hope this helps.

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.

our current president donald trump