William has set a series of goals for himself that are practically unachievable, and his self-esteem ...

William has set a series of goals for himself that are practically unachievable, and his self-esteem drops each time he fails to meet one of his goals. William needs to know that .
 
  a. setting realistic, achievable goals will enhance his self-esteem
  b. being or becoming competent at something will not affect his self-esteem
  c. meeting smaller, clearly achievable goals will have no effect on self-esteem
  d. his perfectionist expectations will ultimately lead to a boost in self-esteem if he is successful e. a need for the approval of others will help to boost his self-esteem