The best way to improve the situation is to prioritize incoming queries based on their type and associated urgency (B). The ITIL 4 Specialist: Create, Deliver and Support documentation (Section 4.2.3) states:
"Prioritization based on impact and urgency ensures that the most critical incidents are addressed promptly, optimizing resource use and minimizing business impact." The "first in, first out" rule fails when high-impact incidents are delayed, and this approach adjusts resource allocation dynamically. Option A increases costs without addressing prioritization; option C adds complexity; and option D shifts responsibility to users. The guide emphasizes: "Effective prioritization is a key practice in managing demand and ensuring service continuity." Reference: ITIL 4 Specialist: Create, Deliver and Support, Section 4.2.3 - Prioritization in Service Desk Operations.