Which idea helped strengthen the acceptance of slavery?

communism--the belief that history is the struggle between economic classes

capitalism--the belief that the market should determine who was rich and who was poor

racism - the belief that some races are superior to others

the Enlightenment--the belief that reason would solve mankind's problems

nope.

explanation:

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.

civil disobedience, refusal to obey the demands or commands of a government or occupying power, without resorting to violence or active measures of opposition