This should be pretty quick to answer: is the optional essay the same thing as a diversity essay? I realize there's probably not a blanket answer for all schools, but both Boston College and Boston University have optional statements that they describe as:
"You may upload an optional statement, regarding any economic, cultural, social, or other factors that you wish for us to consider when reviewing your application." (BC)
"In addition to your personal statement, you may wish to provide another essay. This essay is your opportunity to discuss any aspect of your background or life experience that you believe will enhance your ability to contribute to the diverse BU classroom experience and community. BU Law values and recognizes the importance of diversity. BU Law continues its long-standing tradition of providing opportunities for persons of all backgrounds and providing the excellent training to which a diverse classroom is indispensable." (BU)
I did not choose C because in the stimulus it says the harder to remember passwords are "generally" written down, and if they are written down they are the greatest security threat. Couldn't it be true that some of the people (at least one) with the random passwords do not write them down? That is how I interpreted it under timed conditions and on BR, and then once more as I am reviewing my BR mistakes. It only makes sense if you interpret the "hence..." that follows to apply to all 'hard to remember' passwords rather than only those that are written down.
C says they are always a greater security threat. Sure this is generally true, and always true if the password is written down, but, crucially, I did not think it was a definitive rule we could draw from the stimulus.
Both answer choices A and C seem to rely on assumptions, and A seemed like less of a leap than C. Of course we shouldn't subject ourselves to greater security risks.