Final answer:
In most states, BON members are elected by licensed nurses.
Step-by-step explanation:
The most appropriate statement for the nursing student to include on the poster is: In most states, BON members are elected by licensed nurses. This statement accurately describes the process of how a nurse can become a member of a state's Board of Nursing (BON). BON members are typically elected by licensed nurses to represent their interests and ensure regulatory oversight in the nursing profession.