Final answer:
Option (A), An EpiPen, which delivers an epinephrine injection, is the treatment that can save someone experiencing a severe allergic reaction or anaphylactic shock by rapidly countering dangerous symptoms like a drop in blood pressure and respiratory distress.
Step-by-step explanation:
The treatment that could save the life of someone experiencing an allergic reaction is an epinephrine injection, commonly administered via an EpiPen. This device is a self-administering auto-injector preloaded with a specific dose of epinephrine, which is essential for countering the severe effects of anaphylactic shock. Anaphylaxis can cause symptoms such as a significant drop in blood pressure, respiratory distress, and potential suffocation due to throat swelling.
The epinephrine works rapidly to constrict blood vessels, raise blood pressure, relax smooth muscles in the lungs to improve breathing, and reduce swelling that can obstruct airways. It's critical for individuals with severe allergies to carry an EpiPen as it offers a life-saving intervention in the event of exposure to an allergen like insect stings or certain foods.