Final answer:
The patient with excessive nausea and vomiting who must alternate eating practices should likely address the condition known as Hyperemesis gravidarum, a severe form of morning sickness.
Step-by-step explanation:
The condition described in the question where a patient should eat to taste to avoid nausea, eat a healthy snack at bedtime, alternate liquids and solids every 2 hours (q2h), and eat protein following a sweet snack to prevent excessive nausea and vomiting is Hyperemesis gravidarum (B). Hyperemesis gravidarum is a condition characterized by severe nausea and vomiting during pregnancy that can lead to dehydration and weight loss. This is more severe than the typical morning sickness and often requires medical intervention.