Please assist in helping me understand central bankers:

Independent central banks are run by professionals who are appointed by the elected officials. Once appointed, those professionals cannot be removed from office without cause before the end of their tenures, which are sufficiently long to go well beyond the terms of the elected officials. Which one of following is not a social advantage of delegating monetary policy to the professionals running an independent central bank when compared to keeping it under the control of elected politicians?

1) The professionals running an independent central bank are more likely to be responsive to the demands of the public.

2) The professionals running an independent central bank are likely to have more expertise in managing monetary policy.

3) The professionals running an independent central bank are less likely to manipulate monetary policy as a means of gaining political advantage in elections.

4) The professionals running an independent central bank are less likely to monetize government deficits as a way of expanding fiscal policy without a need for public borrowing.

5) The professionals running an independent central bank are more likely to conduct monetary policy with longer time horizons in mind.