Disadvantages of the fed's "just do it" approach include:
a.
a lack of transparency, which creates doubt about the future course of inflation and output, and makes it hard to hold the fed accountable.
b.
low accountability that may make the fed more susceptible to the time-inconsistency problem.
c.
the strong dependence on the preferences, skills, and trustworthiness of the individuals in charge of the central bank.
d.
only a and b are correct.
e.
all of the above are correct