The Relation S + (T -G)= I + NX Describing

The relation S + (T -G) = I + NX describing the equilibrium of an economy explicitly demonstrates

A) deficit spending by the government reduces either investment and/or net foreign investment.
B) deficit spending reduces private saving (assuming net foreign investment remains unchanged) .
C) as private saving increases net foreign investment must decrease,exports decline.
D) as private saving increases the deficit must decline if investment decreases.