Which sentence clearly reports a technical problem?
กThe system has experienced an unspecified problem recently.
ขThe system has been unavailable since 9:00 a.m.
คThe system might be unavailable at some unrecorded time.
งUsers reported a problem, but its timing is unknown.
เฉลยอธิบาย
The answer states the condition and its starting time precisely and grammatically. The other options each alter or violate a specific part of that meaning or rule. The other options each alter or violate a specific part of that meaning or rule. The other options each alter or violate a specific part of that meaning or rule.