Brain power is the correct answer.
http://www.nbchpn.org/pdf/NBCHPN_handbook.pdf
Your answer may be in there
Answer:
A, To provide a baseline for judging the survival rates of infants who received whole-body cooling
Explanation:
The researchers included the usual care treatment in the experiment so that they could compare the results of this treatment with the results of the whole body cooling treatment. With this comparison, the researchers could assess whether cooling treatment had more positive effects on babies than usual care. Therefore, we can conclude that the investigators included "usual care" treatment to provide a baseline for judging the survival rates of infants who received whole-body cooling.
