Based on the description, <span>marvin is exhibiting :Decentering
Decentering is a psychological distress that happen to someone after being replaced from the center of attention.
Before Marvin's brother is born, Marvin received the full attention from his parents. But now after his brother is born, most of the attention is given to his brother, which is the most likely reason why Marvin is upset
</span>
<span>"according to some research, the degree" of implicit prejudice has declined, but the degree of explicit </span><span>prejudice keeps it alive under the surface.
</span>
Implicit and explicit are two opposite words, the meaning of implicit is, "inferred or saw however not doubtlessly or straightforwardly communicated." whereas explicit means "to completely and unmistakably express something, leaving nothing suggested."
This marital practice is called : Endogamy
Endogamy is a marital process in which the grooms and brides only limited from within local community or tribe.
This marital method is deemed to be out-of-date and only carried out in the past to maintain the 'bloodline' of a specific tribe or clan.
Answer:
A
Explanation:
They were controlled by them.
Hope this helps :D
