Strong Evidence of a Treatment Effect in a Time Series

Multiple Choice

Strong evidence of a treatment effect in a time series with nonequivalent control group design is indicated by

A) discontinuity in the comparison group but not in the treatment group.
B) discontinuity in the treatment group but not in the comparison group.
C) discontinuity in both the treatment group and the comparison group.
D) discontinuity in neither the treatment group nor the comparison group.