In an open economy, the National Income identity (Y = C + I + G + NX) implies that Net Exports (NX) equal:
APrivate Saving plus Public Saving
BGovernment Deficit minus Consumption
CNational Saving minus Investment (S - I)
DImports minus Foreign Aid
Explanation
From Y = C + I + G + NX, rearranging gives (Y – C – G) – I = NX, which simplifies to Net Exports = Saving – Investment (S – I).

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