Answer:
Option C, meclizine
Explanation:
In order to treat the symptoms of vertigo and motion sickness, Andrew should be prescribed the antihistamine medication known as meclizine, which is also called brand names Antivert and Bonine.
By decreasing excitability in the electrical signal pathways thereby slowing conduction within the middle ear, he will not feeling as dizzy.
Terfenadine as an antihistamine is typically prescribed for allergies and symptoms associated with allergies (e.g. hives). Guaifenesin is a cough suppressant and hydrocodone is an opioid agonist analgesic medication.
Therefore, Andrew's vertigo would best be treated with meclizine, option C.