A. oil
B. shipping
C. machinery
D. textile
Correct Answer: Option B
B. shipping
Explanation
‘Invisible Trade ‘. An invisible trade is a business transaction that occurs with no exchange of tangible goods. An invisible trade involves the transfer of non-tangible goods and/or services, such as customer service, intellectual property, and patents. The items involved in an invisible trade are associated with a value and can be exchanged for tangible goods.