Problem: A study was conducted to examine the effects of a drug in the treatment of tuberculosis. The researchers obtained the participants' health records for the past 5 years. The study continued for another 5 years and health records were collected each year. Finally, the researchers analyzed the health records before and after the drug was administered. The experimental design used by the researchers in this scenario is a(n) Blank______ design. Multiple choice question. propensity score interrupted time series nonequivalent control group pretest-posttest nonequivalent control group posttest-only. Need Assignment Help?