Liz's Idea
After entering the bathroom, Liz had splashed some water onto her face, leading to her having a blurry vision which did not allow her to get a clear glimpse of the woman who had just said this statement.
By the time she could clear the water off of her face and respond, she heard the click-clack of heels walking away, before finding herself alone in the bathroom.
Indeed, that statement had summed up all the emotions she had had to face back in the boardroom.
Discrimination based on background was something common that had been occurring since centuries, and would mostly continue to occur for a long, long time.
Yet, here, there were two added reasons for everyone to want her out of that room:
They thought that she was a woman who had used her body to get here, and they felt that her background in education was not enough, at all, for her to carry out the duties of her job.