A turn-key project is best defined as:
a. a form of direct foreign investment in which the investing entrepreneur holds a minority ownership position in the foreign venture
b. a method in which an entrepreneur contracts his or her management techniques and skills to a (foreign) purchasing company
c. a method of doing business whereby a foreign entrepreneur supplies the manufacturing technology or infrastructure for a business and then turns it over to local owners
d. giving a foreign manufacturer the right to use a patent in return for the payment of a royalty