Teachers at School a Were Given a Substance Abuse Knowledge

Multiple Choice

Teachers at School A were given a substance abuse knowledge test.During the next four months,the teachers attended training sessions in substance abuse.They were then given the knowledge test again.Teachers at School B were given the substance abuse knowledge test,and four months later,they were given the test again.What kind of design was used?

A) pretest-posttest true experimental design
B) nonequivalent control group pretest-posttest design
C) control time series
D) matched comparison group pretest-posttest design