Final answer:
The Chlorpheniramine/Hydrocodone combination primarily addresses symptoms of a cough and cold (option C), with chlorpheniramine providing relief from allergic rhinitis symptoms and hydrocodone acting as a cough suppressant and pain reliever.
Step-by-step explanation:
The Chlorpheniramine/Hydrocodone combination is primarily used to address symptoms related to cough and cold (C). Chlorpheniramine is an antihistamine that can help relieve symptoms of allergic rhinitis, like a runny nose and watery eyes. On the other hand, hydrocodone is an opiate (narcotic) analgesic and an antitussive, which means it helps in relieving pain and suppressing cough by decreasing activity in the part of the brain that causes coughing. These medications are not recommended for treating high blood pressure, insomnia, or as empirical therapy in case of chronic non-specific cough, especially in very young children due to the risk of adverse effects and lack of substantial evidence proving their efficacy for these conditions.