Answer: governmental organizational structure.
Step-by-step explanation: When two parties with different nationality made a contract regarding taking care of the seller and customer relationship then such contract will be termed as international customer management contract.
Such contracts are usually written in formal manner and includes obligations to be performed and rights of both parties in case of any default. The government organizational culture affects it indirectly but is not a part of it.
Hence, from the above we can conclude that the correct option is c.