Final answer:
Nursing care for hyperemesis gravidarum includes frequent, small meals. Vitamin C and fasting are not recommended.
Step-by-step explanation:
Nursing care for a primigravida with hyperemesis gravidarum includes frequent, small meals to help control nausea and vomiting. Administering a high dose of vitamin C is not effective in alleviating symptoms. Fasting for 24 hours is not recommended as it can lead to further complications.