【单选题】

We can draw the conclusion from the passage that ______.
A．The incompatible response method is to force child to make unwanted response repeatedly in presence of stimulus until he or she becomes exhausted

B．The threshold method refers to introducing undesired behavior with a response incompatible with the undesired response so they cannot be performed simultaneously
C．The fatigue method means that engaging in the behavior is transformed into avoiding it by introducing the stimulus at full strength so it becomes a cue for not performing it
D．The fatigue method is that in presence of stimulus teachers have child make response incompatible with unwanted response