CONSIDER THIS CASE A major drug company has asked Maribel to test a rain forest plant that, according to what a rain forest native told her, brings relief to people who are having difficulty breathing. She suspects that it might be a good treatment for asthma, a condition in which constriction of airways causes breathing prob- lems. She isolated a component of this plant as a drug. Tests on animals show that it is effective. How should Maribel design an experiment for phase I of the clinical trials? What will be the variable? What will be the control? If the results are positive, what can Maribel conclude? What experimental design should Maribel use in phase II of the clinical trials? What will be the variable? What will be the control? If the results are positive, what can Maribel conclude? How should Maribel design an experiment for phase III of the clinical trials? What will be the variable? What will be the control? If the results are positive, what can Maribel conclude?​