Final answer:
The need for additional education on case management and case managers is indicated by the statement that states case managers can only be licensed professional nurses with extensive patient care experience.
Step-by-step explanation:
The statement that indicates the need for additional education on the subject of case management and case managers is option A) "Case managers can only be licensed professional nurses who have extensive patient care experience." This statement is incorrect because case managers can come from various health professions, such as nursing and dietetics, not just licensed professional nurses.