It is difficult to spread democracy because it has to result from D. Domestic politics within those countries
Democracy cannot work unless the societal norms and politics in the specific country support it. This is why giving nations that are used to dictatorships and monarchies, democracy, might result in them going back to their less than democratic old systems of government.
The other options are wrong because:
In conclusion, democracy can only work when the domestic politics of the country supports it.
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