Final answer:
The nurse will choose treatment for a teenage patient with a pilonidal cyst based on the risk for infection.
Step-by-step explanation:
The nurse who is contributing to the care of a teenage patient with a pilonidal cyst will choose treatment based on the risk for infection (option A). Pilonidal cysts are prone to becoming infected due to the presence of bacteria, especially if proper hygiene practices are not followed. Infection can worsen the symptoms and complications associated with the cyst. Treatment may include antibiotics to treat or prevent infection, and in severe cases, surgical drainage or excision of the cyst.