Answer:
A. The study of how people think about, influence, and relate to other people.
Explanation:
An example of feudalism is the Dark Ages, as feudal lords gave vassals land in exchange for military service or loyalty. Hope this helped??
The answer to your question is d
C. Flynn Effect
The Flynn Effect is the tendency of IQ scores to rise over time. The steady increase in intelligence from generation to generation is proven by a consistent increase in IQ scores. For example, it’s likely that your great grand parent would have scored lower than you on the same IQ test, if you were tested at the same age.