Dr. Watson is interested in health care for children who's families are homeless. She decides to investigate how parents in who are homeless go about finding health care for their children including well-child care as well as emergency care. She decides to interview homeless parents beginning with the question, "Can you tell me how you find health care for you children?" After data analysis, she develops a theory based on the data that describes how homeless families find pediatric healthcare. Dr. Watson will determine sample size _______.
A. before collecting any data.
B. as the data are analyzed.
C. by power analysis.
D. once the literature review is completed..