Who Is Most Likely to Convince Him- or Herself That

Who is most likely to convince him- or herself that he or she believes in the behavior he or she is performing?

A) Jackie, who obeys the speed limit when her radar detector tells her there's a police car in the vicinity
B) Loren, who turns down the radio because his mother says it interferes with her concentration
C) Casey, who stops teasing his younger brother because his parents have threatened to take away his television if he continues
D) Miriam, who pulls her math grade up to a C because her parents threatened to take away her driving privileges if she continued to fail