For a large open economy in a pure flexible exchange rate system, it is expansionary monetary policy

Question:

For a large open economy in a pure flexible system, it is expansionary monetary policy rather than expansionary fiscal policy that will have a negative long-term effect on private investment. Evaluate.
Exchange Rate
The value of one currency for the purpose of conversion to another. Exchange Rate means on any day, for purposes of determining the Dollar Equivalent of any currency other than Dollars, the rate at which such currency may be exchanged into Dollars...