What difficulties did the ECB encounter during the 2020 Covid-19 pandemic? A. The ECB realized the effectiveness of monetary policy was limited and urged member countries to employ more expansionary fiscal policy. B. The ECB encouraged member countries to stop implementing expansionary fiscal policy because it limited the effectiveness of monetary policy. C. The ECB was unwilling to employ any monetary policy since inflation was already at its 2% target rate. D. The ECB dropped its 2% inflation target in order to increase employment, causing inflation rates to increase exponentially