After being referred by a friend, Hasina attended a job interview. She didn't feel it went well but was surprised when her friend told her the boss didn't like that she had worn her hijab, a traditional headscarf. The boss told a co-worker after the interview, 'Our customers prefer working with Christians'. This is an example of:
A. affirmative action.
B. quid pro quo.
C. discrimination
D. hostile work environment.
E. favouritism