I believe that those are the options:
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A. People have no opportunity to make their ideas known.
B. The rights of the minorities may be taken away in the process.
C. The rights of many are suppressed in favor of the rights of few.
D. Civil war often results when people in such a government disagree.
The problem that is a result of direct democracy is C. as the votes of the few will get "buried" in the general numbers, and in representative democracy they would be better represented