Hi Blaise!
In order to understand why (A), (B), and (C) are wrong, let's take a look at the portion of the passage that discusses proponents of individual criminal prosecution. This discussion takes place in the third paragraph and the author states that the proponents of individual prosecution "maintain that individuals are more responsive to deterrence", individuals "generally fear prosecution and the loss of employment", and that punishing a corporation via a fine punishes a variety of people, including the public because of "higher prices." So, our prephrase should be any of these things!
Getting into the answer choices, we see that (A) outlines the belief that shareholders don't have power to influence the corporation. This was not something attributed to the proponents of individual prosecution (in fact, we have no idea whether proponents of individual prosecution believe this or not), so we can eliminate this answer.
Moving to (B), the belief discussed is that employees refrain from wrongdoing only if they are subject to individual prosecution. While the proponents of individual prosecution believe that individuals are deterred from wrongdoing because of the threat of punishment, we do not know whether or not proponents believe this is the ONLY reason corporate employees would refrain from wrongdoing. What if they have their own moral considerations? Ultimately, this answer choice is much too strong and not supported by the text, so it can also be eliminated.
Turning our attention to (C), we see that this answer choice discusses the relative difficulty of corporate prosecution versus individual prosecution. Nothing in the passage attributes this belief to proponents of individual prosecution so it can be eliminated.
Now, to our correct answer! Answer choice (D) states that proponents of individual prosecution believe it is unfair for the public to pay higher costs as a result of criminal prosecution. This is part of our prephrase! At the end of the third paragraph, we see that the punishment of corporations as a whole "essentially punishes... the public, which is forced to absorb higher prices." So, we know this answer is correct because it has textual support.
I hope this helps
Kate