Answer:
The answer is: The significant individual factor that affected Marilyn´s ethical decision-making process was egoism.
Explanation:
Egoism is a synonym for selfishness. It is part of the moral philosophy of an individual.
In this case, Marilyn wanted to become the vice president of ABX Corp. She didn´t act the best possible way, but it doesn´t mean that her actions were wrong. She probably should have acted publicly and reported her findings to the board of directors and not go to press. Her actions benefited ABX Corp. but she was more interested in her personal benefit than the company´s.