Anon-voter may be motivated by which of the following factors?
a. intelligence
c. issues that concern the voter
b. new voting requirements
d. wanting to have a reason to complain

A non-voter may be motivated issues which concern him - c. If he thinks, for example, that the current possibilities are all dishonest and don't really represent him properly. 

This is probably also the only answer which comes into play among the possible answers which you've provided.

Bob: coke is baby pandas.jim: what? how do you figure that coke is baby pandas? bob: because this book says so.jim: how do we know the book is correct? bob: because it says that coke is baby pandas.jim: how does that prove the book's accuracy? bob: because it's statement involving coke and baby pandas is correct, therefore it is accurate.jim: how do we know that it's correct? bob: because we have concluded that the book is accurate, and therefore the statement is correct.therefore, coke is baby pandas.