Which of the Following People Is Using an Internal Justification

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

A) Betty, who points to the fact that she was coerced into an undesirable behavior
B) Colin, who identifies a large reward as the cause of his behavior
C) Terri, who changes her attitude to bring it in line with an undesirable behavior
D) Jessie, who reconciles herself to the discomfort that dissonance produces