Final answer:
D) Routine check-up expenses.
Step-by-step explanation:
Under a nonscheduled plan in health insurance, routine check-up expenses are typically not applied toward the deductible.
Routine check-ups, preventive care, and sometimes diagnostic tests associated with preventive care (such as routine X-rays or preventive screenings) are often covered without requiring the insured individual to meet their deductible first. These services are considered essential for maintaining overall health and preventing more serious health issues. Therefore, expenses related to routine check-ups are often excluded from the deductible in many health insurance plans to encourage individuals to seek preventive care.
Hence, the correct answer is:
D) Routine check-up expenses