old fashion prejudice was different from today because back then every thing was one way and they did not like change. And these days prejudice is caused because people think that other people are not "cool" enough to hang out with them. So in the olden days it was because of race, these days its because people are rude and need Jesus.
When diverse African empires, small to medium-sized nations, or kinship groups came into conflict for various political and economic reasons, individuals from one African group regularly enslaved captives from another group because they viewed them as outsiders.
One of the main causes was the rise of the Nazi party in Germany. Other considerable causes could be issues from past wars such as WW1. The effects were from the Cold War. There was a lot to break down. Some historians did tons of work to bring you and I this knowledge that's for sure.
Hope this is the answer you were looking for and that it helps. :)
Answer: D) Sacrifice the soundness of a decision in order to achieve interpersonal harmony
Explanation: Group thinking involves more and more diverse suggestions for solving a problem, as there are multiple different attitudes and views within the group. It can also mean many different possible solutions, so the option to choose the best ones. There may also be a situation where the objective best solution is often not chosen in order to reach a compromise among the members of the group, because in the group one must always count on vanities and egos. It can also lead to slow and often ineffective decision making until all the solutions offered are reviewed. However, the worst-case scenario is to intentionally sacrifice the right solution for the sake of interpersonal harmony. This means that the group essentially did not meet to find the best solution, but to treat the excessive vanities and egos of its members.
The correct answer to this question is this one: "D. having a rock concert in a public park in Japan"
The first three have a key point: requiring or changing by force. The last one just says having a rock concert in a public park in Japan. It's not forced, but voluntary whereas the first three are in a sense, forced.