Between A and B, I go with B+. Every N years, a pro-forma bill is drafted, but a few legislators will take the opportunity to grandstand about the existing leg

Between A and B, I go with B+. Every N years, a pro-forma bill is drafted, but a few legislators will take the opportunity to grandstand about the existing legislation that relates to the theme of their upcoming re-election campaign. This result in a few high-visibility but ultimately low-impact tweaks. Two edge cases will also arise less frequently. First, the extra importance of the pro-forma bill means that fillibuster threats have extra leverage. This will play out similarly to the government shutdown. Second, in instances where one party controls both houses and the Presidency during re-up time, sweeping legislative reforms are more likely (e.g. repealing Obamacare would have been easier if repeal was the default).