Which of the Following Represents a Glass Ceiling Effect

Which of the following represents a glass ceiling effect?

A) Patricia was not promoted to the position of a marketing manager because Anthony was more qualified for the position.
B) Donna received a biased job evaluation by Scott, her manager, who favors his male team members over her.
C) Timothy was not selected for a job because he did not have the relevant skills for it.
D) Amy, who is a mother of two children, experiences a large pay gap compared to the single women at her office.