I think the answer is C, I’m not quite sure . Please tell me if I’m right?
Answer:Assimilation
Explanation:Assimilation is a cognitive process in which we relate the new learned infomation to the preexisting Information. It is a concept suggested by Piaget on cognitive development in children , children are always learning new information in order to develop their knowledge and if 4 year old has learned what a whistle is and what sounds it makes , they are likely to associate anything that makes the similar sound to a Whistle.
Serious and formal due to our lack of information about them we should stray far from making jokes which could be misinterpreted
They avoided slavery they didn't use the word slave instead of calling them slaves they refers everyone as "people "