They'd probably all be Bs at that point. It seems likely that Italy will end up reducing its purchase rate and thereby punt the 90 vs. 45 decision into the lap of some future administration.
If you take Italian politics too seriously (as a non-Italian) you will surely go mad, but my broad understanding is that it is a squabble among leftists who hate all armed forces, Europhiles who mistrust the U.S., and Atlanticists, and that a clear-cut final decision is unlikely.