Final answer:
Sumatriptan is typically expected to be ordered for a patient experiencing a mild migraine, as it is specifically designed for the acute treatment of migraine attacks.
Step-by-step explanation:
The medication a nurse would expect to be ordered for a patient experiencing a mild migraine is generally A) Sumatriptan. Sumatriptan is a type of triptan medication specifically indicated for the acute treatment of migraine attacks with or without aura and is effective at relieving the pain and other symptoms associated with migraines. On the other hand, B) Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) that could also be used for mild migraine relief but is not as specific for migraines as Sumatriptan. C) Propranolol and D) Amitriptyline are often used for migraine prevention and are not typically the first choice of treatment for an acute migraine attack.