Which of the following is an example of implicit bias?

Question $6$ options:

A$)$

A judge decreeing that all women who appear in his courtroom must wear dresses or skirts.

B$)$

A teacher asking the tallest child in the class to help them get something from a high shelf.

C$)$

A casting director for a radio advertisement rejecting an application because of the applicant's Asian$-$sounding name.

D$)$

A nightclub owner rejecting applicants for a front door security guard position because they are too small.