In a Graph of Single-Subject Research Data,a Clear Indication of a Treatment

Multiple Choice

In a graph of single-subject research data,a clear indication of a treatment effect is a ____.​

A) ​delay between the time the phase is changed and the time behavior begins to change
B) ​large, immediate change in pattern
C) continuation of the same average level from one phase to the next
D) ​gradual change in behavior