In usability and user experience, system feedback is critical. Users expect clear, timely responses from the system to confirm their actions are received and processed. Lack of feedback (e.g., when clicking a button yields no visual response) leads to confusion, frustration, or repeated actions.

Option B is correct because it highlights a genuine issue from a user’s perspective — inadequate feedback, which affects usability and satisfaction.

Other options:

A focuses on technical infrastructure (architecture, computing power) — a technical or business concern, but less so from a user’s lens.

C is mostly correct but fits the technical or test engineer’s perspective rather than the user’s.

D is inaccurate — selection of performance tools is primarily a technical/test management decision, not business-driven.

Answer: B. From a user perspective, missing feedback from the system when processing a request is a problem.