Happy to help. Answer C's wording is a bit confusing, but it's saying the same thing that you think it should be saying. Here's why.
We know from the stimulus that DFW - ->M and I
The contrapositive is /M or /I - ->/DFW
Answer C says if the electorate is not moral and intelligent, then a democracy will not function well. The first part of this answer choice, "if the electorate is not moral and intelligent," is the negation of the necessary condition of the original statement: a moral and intelligent electorate are necessary for democracy to function well. When it says "if the electorate is not moral and intelligent," it just means that if an electorate is not both of these things, then democracy won't function well. This means the same thing as what you thought it should be saying, "If an electorate is not moral or it is not intelligent, then a democracy will not function well."
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