Given the context of high inflationary pressure combined with low unemployment and steady GDP growth, the most plausible course of action would be:
The Federal Reserve should use monetary policy and raise the reserve requirement, decreasing the money supply.
Raising the reserve requirement would reduce the amount of money banks can lend, which could help to cool inflation by decreasing the money supply in the economy. Other options, like lowering taxes or increasing spending, would likely exacerbate inflation, while buying government bonds would also increase the money supply, which is not advisable in an inflationary environment.