: 错For small open economy, assume that the marginal propensity to import is 0.3, and that interest rates, exchange rates, and the price level are all constant. If an increase of $10 billion in government spending results in an increase of $6 billion in imports, then:A:real domestic investment decreases by $4 billion. B:taxes increase by $10 billion. C:real GDP increases by $4 billion. D:the spending multiplier is 2.