Many people in eighteenth-century england and america opposed slavery and the best ways to fight against injustice are:
Injustice can be described as the unfair treatment which can be seen as the situation in which the rights of a person or a group of people are ignored.
It should be noted that this can be seen in most of the organization as well as the society, however there are some organization is devoted to fighting injustice, hence educating others about injustice as ell as working to change laws can help to fight injustice.
Therefore, option B and C are cortrect.
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