Final answer:
The frequency at which members must demonstrate firearm proficiency is most likely aligned with the period of handgun license renewals, which is annually. Therefore, the correct answer is D: Annually.
Step-by-step explanation:
The question refers to the frequency with which members, likely those in a law enforcement or security role, must demonstrate proficiency with firearms. Although the specific frequency can vary depending on departmental policy or jurisdictional law, in the context provided by the student's question, a fixed option must be selected from the choices provided. The student's reference material indicates that police could issue one-year licenses for handguns and that there were also requirements for how firearms were stored unless being used at a business or for legal recreational activities.
Without further context suggesting a different schedule for proficiency demonstrations, the most logical assumption would be that proficiency would need to be demonstrated at least as often as licenses are renewed. Thus, it would stand to reason that the required frequency would align with the period of the handgun licenses, pointing towards an annual demonstration of proficiency. Therefore, the best answer given the options would be: D: Annually.