Post-crisis environments in AEs frequently present central banks with a difficult trade-off. They must manage inflationary pressures while simultaneously supporting economic recovery, a task often made more challenging by pre-existing high levels of public debt and political pressures against fiscal austerity. This significantly constrains monetary policy options.

A is incorrect: The zero lower bound and debt overhang do limit the effectiveness of rate cuts, but post-instability, the combination of that with high debt is the key constraint.

B is incorrect: While coordination is always a factor, the direct constraint post-instability is the need to balance inflation and growth amid high debt.

D is incorrect: While financial stability becomes more important, the direct constraint is the balancing act between inflation and growth given high debt.