Staff Nurses in an ICU Setting Have Noticed That Their $\mathrm{RN}$

Staff nurses in an ICU setting have noticed that their patients required lower and fewer doses of analgesia when noise levels on the unit were consciously reduced. They informed an advanced practice $\mathrm{RN}$ of this and asked the APRN to quantify the effects of noise on the pain levels of hospitalized patients. How does this demonstrate a role of the APRN?

A) Involving patients in their care while hospitalized
B) Contributing to the scientific basis of nursing practice
C) Critiquing the quality of patient care
D) Explaining medical studies to patients and RNs