Final answer:
A nurse must obtain continuing education credits to maintain their nursing license, which can include attending hospital in-services and other approved educational programs.Hence option C and D are correct answers.
Step-by-step explanation:
To ensure the continuation of his or her nursing license, a nurse needs to obtain continuing education credits. This often involves attending workshops, seminars, hospital in-services, or other educational programs that are approved by the nursing licensing board. While advanced degrees such as a baccalaureate or master's degree can be beneficial for career advancement, they are not typically required for maintaining a nursing license.