Final answer:
Ontario residents with OHIP coverage are eligible for the Ontario Drug Benefit program if they are seniors aged 65 and older, reflecting a similar approach to the U.S. Medicare program which also provides health insurance to those over 65.
Step-by-step explanation:
Residents of Ontario must have OHIP coverage to be covered by the Ontario Drug Benefit (ODB) program. Among the categories eligible for coverage, the correct answer is C) Seniors (65 years and older). This reflects the broader understanding that government health insurance programs, such as Medicare in the United States, provide health insurance to those over the age of 65. Both Medicare and ODB focus on ensuring seniors, who often face higher medical expenses, receive sufficient healthcare coverage.