Final answer:
Premium payments for a qualified long-term care policy made from an HSA are not taxable upon withdrawal if they are for qualified medical expenses, resulting in 0% of the payment being taxable as ordinary income. Therefore, the correct option is A.
Step-by-step explanation:
If Jan pays for her qualified long-term care policy premiums using a health savings account (HSA), the premium payment would not be taxable upon withdrawal, provided the withdrawals are for qualified medical expenses. HSAs offer the benefit of tax-free withdrawals for such expenses. Therefore, the answer to the question about what amount of her premium payment would be taxable as ordinary income upon withdrawal is A) 0%.