Final answer:
The experimental design likely included important elements such as randomization, control and experimental groups, and may have used blinding and a placebo. Results from the graph are necessary to comment on the effectiveness of the new drug and to determine the most effective treatment.
Step-by-step explanation:
The experimental design of the study appears to compare the effectiveness of a new drug in treating a condition or disease. In the context of biology and medical research, such an experiment would likely include a control group and an experimental group to which the new treatment is applied. Key aspects of the design include randomization, blinding, and the use of a placebo to ensure reliable data. Specifying the explanatory variables (such as dosage of the drug) and the response variables (such as tumor size or patient recovery rates) is crucial.
Without a graph to review, specifics about the results cannot be addressed. However, in such studies, the results would focus on whether the new drug led to a statistically significant improvement over the control group, measured by pre-defined outcomes such as reduction in disease incidence or tumor size.
To identify which drug was the most effective, data from the graph would be required, comparing outcomes between different treatment groups, including placebo and control groups. The drug that shows the greatest positive effect on the measured outcomes would be considered most effective.