Q2 biostatistics

A study was conducted to investigate the effectiveness of a new drug for treating AIDS patients. A group of AIDS patients was randomly divided into two groups. In addition to the standard antiviral combination therapy, one group received the new drug and the other received a placebo. The difference in subsequent survival (those with drugs those without drugs) was found to be 1.04 years and a 95% confidence interval was 1.04 i 2.37 years. Which of the following statement(s) is/are true? I: We can conclude that there is no evidence the drug was effective because the 95% confidence interval covers 0. II: We can conclude that the drug was effective because those taking the drug lived, on average, 1.04 years longer. Ill: We can conclude that the drug was ineffective because those taking the drug lived, on average, 1.04 years less. O a. land |l only 0 b. In only 0 c. | only 0 d land lll only 0 e. ll only