Ang Li has found it rather hard to move up in her managerial career at her workplace especially when compared to how fellow graduate from Tri$-$Valley, American$-$born Adam Watson, has managed to become the regional manager of sales in the company. This suggests the presence of $\_\_\_\_\_\_\_\_$ in Li's organization.

Question $73$ options:

A$)$

prejudice

B$)$

goldbricking

C$)$

a self$-$serving bias

D$)$

a glass ceiling