The columnist is claiming that intent is not always the only metric that is used to evaluate the morality of an action. In particular, the columnist claims that sometimes the result will affect evaluation of an action.
We're looking for the answer choice that will best explain the columnist's take on this subject.
(A) is out of scope - the columnist is not concerned about what is fair.
(B) is out of scope for the same reason as (A).
(C) is out of scope - it's a normative statement whereas the columnist's argument above is purely descriptive.
(D) is quite in line with what we read above. I also really like that it doesn't have the normative bent of (A), (B), and (C) as described above.
(E) is not necessary and perhaps not justified in light of what the columnist said - particularly the word "rarely" is troubling in this context.
So our answer is (D)!