Users (customers) are complaining about the quality of how problems are being solved.

InITIL’s problem management process,poor registration of problems(A) is the most likely cause of low-quality problem resolution. Effective problem management requires accurate logging of incidents and problems, including detailed descriptions, to enable proper root cause analysis and resolution. If problems are poorly registered (e.g., incomplete or inaccurate data), it hinders diagnosis and resolution, leading to customer dissatisfaction.

Wrong allocation of problems (B):Incorrect assignment to teams can delay resolution but is less fundamental than poor registration, which affects the entire process.

Errors in priority (C):Incorrect prioritization may delay urgent issues, but poor registration impacts resolution quality more directly.

Lack of budget (D):May limit resources, but the scenario points to process quality, not resource constraints.