Research suggests that one of the best ways to decrease prejudice is to encourage

Research suggests that one of the best ways to decrease prejudice is to encourage cooperation.

Explanation:

Prejudice is often due to baseless and illogical hatred towards others. It is clear from the results of multiple types of research. As individuals or groups of individuals that are prejudiced against each other can be made to clear the prejudice.

It is done by creating situations that make them cooperate with each other. Cooperation helps the individuals know each other better and with that, the prejudices disappear.

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

the main idea of monster inc is good and evil

if im wrong correct me but have a blessed day!