Final answer:
The form of a medication dictates its route of administration, with the oral route being the most convenient for home administration of an antimicrobial to treat a systemic infection.
Step-by-step explanation:
The form of a medication usually dictates the route by which it will be administered. Therefore, the correct answer to the question is B. form.
Appropriate Route for Home Administration of an Antimicrobial
When treating a systemic infection at home, the most convenient and appropriate route of administration for an antimicrobial is typically the oral route. This is because oral administration is non-invasive and easy for patients to manage themselves. In contrast, intravenous administration often requires medical expertise, equipment, and can involve more risk, making it less suitable for home use. Topical applications are for local treatment, not systemic infections. Lastly, parenteral administration, which includes intravenous, intramuscular, and subcutaneous injections, is more invasive and also generally requires professional assistance.