Which sentence is a clear recommendation supported by a reason?
กWe recommend replacing the lock because several employees have said that the current model looks old and inconvenient.
ขThe lock should probably be replaced soon, since most people in the office appear to feel uncomfortable using it.
คWe recommend replacing the lock because two independent tests showed that it can be opened without authorization.
งA new lock would improve the entrance because modern hardware stores offer designs that match the renovated office.
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