Final answer:
The reason could be that there is no configuration for Open enrollment for the XX Life Program.
Step-by-step explanation:
The reason why the benefits administrator cannot find the life event date of March 15, 2017, for Program: XX Life Insurance could be option C) There is no configuration for Open enrollment for the XX Life Program. This means that the open enrollment window for the XX Life Program is not set up or activated, so there are no life event dates available for that program.