Correct answer: C. Entry into premises will not be allowed without approved identity card
Explanation: The direct answer is C: “Entry into premises will not be allowed without an approved identity card” is a rule. A rule is a specific, compulsory instruction that tells people exactly what is permitted or forbidden. Step by step: the statement names a condition, an approved identity card; it gives a definite result, entry will not be allowed; it leaves no normal choice to the employee at the gate. Therefore it is a rule rather than a broad policy. Option C is correct. Option A, choosing a solution after considering the customer’s situation, is flexible guidance and therefore resembles a policy. Option B, maintaining fairness in employee matters, gives a broad principle and also resembles a policy. Option D, giving preference to trusted suppliers, states a general purchasing direction and is a policy-like guideline. The key distinction is discretion: policy guides judgment, while a rule removes or sharply limits discretion. Memory cue: words such as “must,” “not allowed,” or “only if” often signal a rule, though the whole meaning should be checked.