According to research by psychologist william perry, students entering harvard university tended to have a view of the world where they reasoned that something was good or bad, people were good or bad, and others were for them or against them. he called this:
a) pos-tformal thoughtb) dualistic thinkingc) dialectical thinkingd) formal operational thought

b.  dualistic thinking

Explanation:

Dualistic thinking -

It is the method of thinking , where both the aspect of any person or thing is considered, i.e. , both the good and bad aspect , is known as dualistic thinking.

This method enables the person to think in both the way while making any decision,

Hence, from the question , the correct term according to the given information of the question , is   dualistic thinking.

answer; ///(c) i believe that the correct answer is ethnic relations bear many similarities across different global; good luck

answer; (b) ; /stronger bonds between the nations of africa