The answer is that "since they do not interact with the electromagnetic force, they do not feel friction or drag and hence do not contract with the rest of the protogalactic cloud." WIMPs (Weakly-Interacting Massive Particles) are hypothetically constituted to dark matter. It is in their nature to be less interactive, so they are scattered throughout galactic halos and not focused into the galaxy's disk.
C.) The environment is seldom affected by technological advances.
I think it's B, if they are geographically around one another and share some racial background they are related. DNA, for example does prove we can be closely related. Genetics and such.
Really hope this helps, tell me if i'm wrong!
Hello there!
The correct answer to that would be D. Ideal climate for growing crops.
Hope This Helps You!
Good Luck :)
