Which Statement Represents a Potential Area of Research for a Novice

Which statement represents a potential area of research for a novice nurse researcher?

A) "Most of our hospital admissions come in at night."
B) "It is difficult to find personnel willing to work the night shift."
C) "It seems that most of the patient falls on our unit occur during the night shift."
D) "The night shift personnel are not attending promptly to the needs of our patients."