In the Study Involving Betters at a Racetrack, It Was

In the study involving betters at a racetrack, it was found that:

A) those who were interviewed before they placed their bets showed a higher confidence that their horse would win
B) those who were interviewed after they placed their bets showed a higher confidence that their horse would win
C) those who were interviewed after they placed their bets showed a lower confidence that their horse would win
D) both groups showed an equally high confidence that their horse would win
E) both groups showed an equally low confidence that their horse would win