Final answer:
Debra, age 68, will most likely find healthcare coverage through Medicare, which offers health insurance to individuals over the age of 65.
Step-by-step explanation:
Debra, who is 68 years old with very low income and very few financial assets, is most likely to find healthcare coverage through Medicare. Medicare is a federal program that provides health insurance to individuals over the age of 65 regardless of income. Since Debra does not have health insurance from an employer, Medicare is designed specifically to assist individuals in her situation, ensuring that the elderly receive necessary healthcare coverage.