Researchers plant and devine have identified two basic motives that people have for overcoming prejudice: internal and external. according to these researchers, the internal motive is based on

A strong inner belief that prejudice is wrong

Explanation:

Internal motive also called intrinsic motivation. It is inside fro a person. When a person gets motivated by its inside moral values, determination. It is about to drive the reward internally. When the reward occurs internally it satisfies a person internally and externally in both the terms. Internal motivation is the opposite of external motivation.

Intrinsic motivation need not any reward from outside. When we get motivated to do work internally, we enjoy that task a lot and to explore, learn and get to know about our potential.

c. wright mills's sociological imagination suggest investigating to explain this increase?

for many centuries there were important factors which the economies of the muslim empires developed increasingly. they applied economic procedures in production, investment, finance, taxation and property. they used to tax certain goods (for example: harvest), they charged interest on money lent, they signed contracts with merchants; they relied on a common currency, and they used checks as well as promissory notes. with the money collected by means of taxation, the government provided the needy with an income. in addition, trading networks covered huge distances, so far regions started to have contact and exchange goods. this trade network covered areas of asia, africa and europe.