According to the Balance of Transfers, the "+" Sign Refers

According to the balance of transfers, the "+" sign refers to _____ and the "-" sign refers to _____.

A) payment of foreign aid loans; a payment going abroad as foreign aid
B) when foreign services are used; when foreign services are used
C) incoming dollars coming in when merchandise is exported; dollars that leave the country to pay for imports
D) merchandise imports; incoming dollars
E) earnings from overseas investment; payments are sent overseas