When Single Subject Designs Are Used

When single subject designs are used:

A) it is important to choose a target behavior for measuring the improvement only
B) it is important to choose a target behavior for measuring the reduction in the problematic target behaviors only
C) it is important to choose a target behavior for measuring the change irrespective of whether it is the reduction or increase in the target behavior that is sought
D) it is not important to choose a target behavior for measuring the change irrespective of whether it is the reduction or increase in the target behavior that is sought