Recent Research by Mark Bils and Peter Klenow Suggest That

Recent research by Mark Bils and Peter Klenow suggest that

A) Keynesican sticky price models match key business cycle facts well.
B) prices are generally not as sticky as previously believed.
C) Keynesian sticky price models to not match certain business cycle facts well.
D) prices are much more sticky than what was previously believed.
E) prices change for most goods around once a year.