Later a different kind of trade in the form of transportation, communication, banking, insurance, consulting, information etc. gradually became more and more important. This type of trade is called ______.

Later a different kind of trade in the form of transportation, communication, banking, insurance, consulting, information etc. gradually became more and more important. This type of trade is called ______.

A.visible trade

B.invisible trade

C.domestic business

D.international investment

正确答案是A