The Following Graph Illustrates a Study on the Effects of a Teaching

The following graph illustrates a study on the effects of a teaching intervention across teaching sessions. The graph illustrates that a ______ quasi-experimental design in which the intervention ______ math test scores compared to the control group. The graph shows the means for the groups on a math tests which can range from 0 to 10.

A) Time series; improved
B) Non-Equivalent Control Group; had no effect on
C) Time series; had no effect on
D) Non-Equivalent Control Group; improved

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