Question 4 Select one answer. Newborn Brain Damage Researchers studied 208 infants whose brains were temporarily deprived of oxygen due to complications at birth. When researchers detected oxygen deprivation, they randomly assigned babies to either usual care or to a whole-body cooling group. The goal was to see whether reducing body temperature for three days after birth increased the rate of survival without brain damage. What is the purpose of including the \"usual care\" treatment in the experiment? A. Q) To provide a baseline for judging the survival rates of infants who received whole-body cooling B. 0 To control for the placebo effect and keep it from confounding the results C. 0 To create similar treatment groups so that a causeand-effect relationship can be established Question 5 Researchers randomly divide participants into groups. Each select one answer' group takes a different amount of omega-3 fatty acid supplements daily for a month. One group receives a placebo. The researchers measure the impact on cholesterol levels in the blood. What is the purpose of random assignment in this experiment? A. C) To produce treatment groups with similar characteristics B. To ensure that all people with high cholesterol have an equal chance of being selected for the study C. 0 To increase the accuracy of the research results and prevent skewness in the data