Which of the Following People Is Using an Internal Justification

Which of the following people is using an internal justification to reduce dissonance?

A) Justin, who identifies a large reward as the cause of his behaviour
B) Christiane, who changes her attitude to bring it in line with an undesirable behaviour
C) Denise, who reconciles herself to the discomfort that dissonance produces
D) Michelle, who points to the fact that she was coerced into an undesirable behaviour
E) Blaine, who views his boss as the cause of his behaviour