The National Income Identity Can Be Rearranged to Yield the Relationship

The national income identity can be rearranged to yield the relationship between:

A) the international flow of goods and services to the international flow of capital.
B) the national flow of goods and services to the national flow of capital.
C) the international flow of goods and services to the government's budget constraint.
D) savings and the international flow of capital.
E) the money supply and the exchange rate.