Why must minority groups resort to public protest to fight discrimination

To draw the attention of the majority group to the problems they suffer.

Explanation:

Protests refer to the actions that people take to express their opinions or problems. The protests have been going on for a long time, as a means of publicly expressing the desire to obtain a change towards their problems.

For example, minority groups use public protests where they can express their opinions, problems, and requests, through demonstrations that are mostly peaceful but sometimes violent. One of the great protests that minority groups have had is against discrimination and they have taken to the streets to attract the attention of society in general and ask for a change in the situation.

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it was certainly a debatable decision, mainly because it was based primarily on political - and not on legal or social - views. since the congress at that time was led by members of the republican party, and the territory that the tribes wanted to turn into an exclusively indian state was predominantly democratic, the proposal (as expressed in the constitution) did not succeed, but the constitution itself proved to be of crucial importance in the creation of the state of oklahoma, and, most importantly, it guaranteed the involvement of representatives of the indian tribes in the government of the future joint state.  

as a member of congress, i would have voted to ratify the constitution, or at least to have it tabled. ignoring it was an interested and partial decision.  

i think the answer's are a) b) and c)