The question stem just asks for what those in favor of criminally prosecuting individual employees in corporations believe. At this point, you remember that, "Hey, that's the 3rd paragraph." and you skim to refresh your mind as to what they thought, so that way the answer choices don't disorient you.
Let's go through the answers.
A.) Unsupported -- Nothing about the power of shareholders here. This is tangentially discussed in the fourth paragraph, and it is vague as to whether this supports civil or criminal prosecution.
B.) Unsupported -- "Only if" suggests a requirement that was not discussed, so this answer is just unsupported.
C) Unsupported -- Difficulty of prosecution and a comparison of the ease of prosecuting is never discussed regarding the views of those in favor of criminal prosecution
D) Correct -- The last sentence of the 3rd paragraph states that those in favor of criminal prosecution of individual employees believe that when instead of targeting individuals you target the company it "essentially punishes...the public, which is forced to absorb higher prices." You can say that this is "unjust" since the public didn't do the wrongs in question.
E) Unsupported -- The frequency of wrongdoing towards identifiable victims is not discussed in the paragraph covering the group in question, those in favor of criminal prosecution.