Based on the information provided, Merlin could potentially be considered a qualified individual with a disability under the Americans with Disabilities Act (ADA) of 1990.
However, Nabil's past drug use alone would not qualify him as an individual with a disability under the ADA
Merlin's history with drug addiction: The ADA defines a "disability" as a physical or mental impairment that substantially limits one or more major life activities. Merlin's past addiction, especially if it involved dependence or required treatment in a supervised program, could be considered a physical or mental impairment. However, it's crucial to note that the ADA requires the impairment to be "substantial" and "limiting" in order to qualify.
Nabil's past casual drug use: While Nabil's past drug use might raise concerns, it alone is not sufficient to qualify him as a disabled individual under the ADA. The ADA focuses on limitations resulting from current impairments, not past experiences or potential risks.
Therefore, the most likely answer is: OA is Merlin only