b} - Say that only the "real annointed i.e.Governing Body candidates" really partake, but quit counting numbers of partakers because that is a "distraction" and invites "unqualified persons".
d} - fudge the numbers in a downward spiral for a few years, then end up with one of the a..b..c.. scenarious. This would lessen the shock wave.
I like these, but JW style would suggest E, if that doesn't solve it, resort to D.
e} - start beating up on the R&F about "false partakers" and "drinking blood to yourselves if you are unworthy". Repeat until total submission occurs.