I believe the answer to the question is awareness. This is the stage where Tobias realizes that Rachel keeps putting his toothbrush on the cabinet and it finally erupts him.
Thank you for your question. Please don't hesitate to ask in Brainly your queries.
It had people from many places
"To the west it is connected to the Da Hinggan Range by the Yilehuli Mountains, which run northwest-southeast for some 375 miles (600 km). ... Although the two ranges have similar names, the Xiao Hinggan is a completely different mountain system from the Da Hinggan (Greater Khingan)."
From the information I know at this time i believe it is C.
hope this helps
I think it was because we really don't know what exactly happened in the past.
Also, I'm pretty sure people did not keep track of colored people back then.