Answer:
B. incidental beneficiary.
Step-by-step explanation:
In this specific scenario, Spiffy is an incidental beneficiary. An incidental beneficiary is a third party individual/company that benefits from a contract or agreement between two parties which the third party has no involvement in and it is not the intention that the third party benefit. Which is what is happening in this case, since Spiffy's has no involvement in the contract between Martina and Alexander but still benefits due to Martina's requirements.