Keep in mind that there is a non-zero cost to the un-remembered, in that they may be cognizant that they will not be remembered prior to their death.
I would tell the couples that I am going to choose A, but instead choose B.
I would tell the couples that I am going to choose A, but instead choose B.
Which makes you a bad with respect to most varieties of deontological and virtue ethics.
When the consequences are clear, and you have no other options, the rational choice is to ignore virtue ethics.
Of course, in real life, there is almost never such a clear-cut problem as this, and pat examples are often used by those who want to throw away virtue ethics out of convenience rather than actual utilitarian benefits.