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A
Approach the dog and deliver the mail anyway
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B
Do not put yourself at risk — avoid the aggressive dog, do not deliver where it is unsafe, and report the dog hazard so the situation can be handled per USPS policy
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C
Throw something at the dog
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D
Spray the dog and continue
Why this is the answer
Carrier safety, including avoiding dog attacks, is a serious and frequently tested concern. The best response prioritizes personal safety: do not approach an aggressive dog or deliver where it is unsafe, and report the hazard so USPS can follow its procedures (which may include temporarily suspending delivery to that address and notifying the customer). Dog bites are a major cause of carrier injuries. Forcing the delivery, antagonizing the animal, or taking aggressive action all increase the risk of injury. The exam rewards responses that protect the carrier's safety while following proper hazard-reporting procedures.
Source: USPS 474 VEA — Carrier Safety, Dogs