Answer:
C, a primary form of corporate giving
Explanation:
Corporate giving can be defined as gifts or donations made by a corporation to its environment.
It can also be said to be the social and/or philanthropic contributions of a corporation to its environment.
Clause-related marketing is one in which a corporation uses its activities to market another corporation.
This type of marketing is an form of corporate giving as it helps to put focus on the other company through its own activities in that company.
Cheers.