Answer:
B
Explanation:
I know a lot ab history :)
<span> this method, which can use over 100 questions, gathers : biodata
Biodata is a set of file that consist of factual information about an individual, including facts such as name, age, gender, hobby, height, marital status, favorite song, etc.Researcher often use biodata to screened out the potential subject for their research</span>
The theory that infants use their early relationships to develop a set of assumptions that become a frame of reference for later in life is the working model.
<h3>What is the working model in psychology?</h3>
In psychology, this model is the representation that children while they are infants are able to have mental representations through the relationships they form with their care givers.
The model is known to influence how the child is able to bond and form relationships with other people as they grow.
Read more on child psychology here: brainly.com/question/3951300
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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.