Renee's Employer Operates on a Policy of Promoting from Within

Renee's employer operates on a policy of promoting from within based on seniority and the ability to competently perform in the position. Renee is 55 years old, and her seniority and experience place her first in line for a promotion to a newly vacant position. She has been informed by her employer that a younger person is preferred for the position. How should Renee pursue recourse in these circumstances?

A) file a complaint with her provincial human rights commission
B) file a complaint with the Canadian Employee Rights Commission
C) file a lawsuit
D) file a complaint with her union's representative