请教一道逻辑题(新东方逻辑蓝皮书P130-341)

When people predict that a certain result will not take place unless a certain action is taken, they believe that they have learned that the predication is correct when the action is taken and the result occurs. On reglection, However,it often becomes clear that the result admits of more than one interpretaion.  题目到底什么意思啊？看不懂

Which of the following, if ture , best supports the claims above?

A  Judging the success of an action requires specifying the goal of the action

B  Judging which action to take after a predication is made requires knowing about other actions that other actions that have been successful in similar past situations

C Learning whether a certain predictive stategy is good requires knowing the result of using that strategy through several trials

D Distinguishing a correct predication and effective action from an in correct predication and ineffective action is often impossible

E Making a successful predication requires knowing the facts about the context of that predication  

答案是D