If C Represents Aggregate Consumption, I_d Represents Domestic Investments, G

If C represents aggregate consumption, I_d represents domestic investments, G represents government expenditures, E represents national expenditures on goods and services, X represents foreign demands for exports, and M represents domestic demand for imports, then aggregate demand in an economy equals:

A) C + I_d + G.
B) E + C + I_d + (X - M) .
C) C + I_d + G + (X - M) .
D) C + I_d + G + (M - X) .