In a study by Jones and Harris, subjects were shown an essay that was favorable to Fidel Castro. ...

In a study by Jones and Harris, subjects were shown an essay that was favorable to Fidel Castro.
 
  Half were told that the essay's author had been assigned to write the pro-Castro essay, whereas the other half were told that the author had chosen to write the pro-Castro essay. All subjects were then asked to estimate the true attitude of the author toward Castro. What happened?
 
  (a) Only when the author was seen as having chosen to write the essay was he rated as liking Castro.
  (b) Only when the author was seen as required to write the essay was he rated as liking Castro.
  (c) The author was rated as liking Castro both when he was seen as having chosen and as having been assigned the essay.
  (d) The author was only rated as liking Castro if the subject making the rating liked Castro.