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8. A study was conducted to determine the effectiveness of a new serum for treating diphtheria, a common and often deadly respiratory disease. A researcher conducted his study over a one-year period in one particular hospital. New diphtheria patients admitted to the hospital received different treatments based on the day of admission. On the "even" set of days, the patients were treated with the new serum daily and received the standard treatment. On the "odd" set of days, patients received just the standard treatment. Over the one-year period of the study, 8 of the 239 patients admitted on the "even" days and treated with the serum died, whereas 30 of the 245 patients admitted on the "odd" days died. Complete parts (a) and (b) below. (a) Describe the control and treatment groups for the study. Choose the correct answer below. O) A. The treatment group consisted of those who received just the standard treatment, and the control group consisted of those who received the new serum and standard treatment. O B. The treatment group consisted of those who received the new serum and the standard treatment, and the control group consisted of all patients who were admitted. O C. The control group consisted of those who received just the standard treatment, and the treatment group consisted of all patients who were admitted. O D. The control group consisted of those who received just the standard treatment, and the treatment group consisted of those who received the new serum and standard treatment. (b) What conclusions can be drawn from the study? Explain. Choose the correct answer below. O A. When the new serum was combined with the standard treatment, it proved ineffective in treating diphtheria. O B. When the new serum was combined with the standard treatment, It proved effective in treating diphtheria. O C. Patients who were treated with the new serum are more likely to die from diphtheria. O D. The standard treatment is more effective in treating diphtheria