Which of the following reflect(s) the motive to maintain high self-esteem?

Which of the following reflect(s) the motive to maintain high self-esteem?
 
  a. After Sarah leaves Bob for someone else, Bob decides that he wasn't really good enough for her anyway.
  b. Students who want to take Professor Lopez's seminar have to apply by writing a 10-page essay. Everyone who is selected ends up loving the class.
  c. Janetta did poorly on the first test in her psychology class. She admits that she didn't study enough and vows to study harder for the next test.
  d. Zach has been involved in several minor traffic accidents since getting his driver's license. There sure are a lot of terrible drivers out there, he says. People should learn to be good drivers like me.