Final answer:
Sponsors must ensure that the individual is likely to have prescription drug costs that will exceed a certain threshold set by the Secretary of Health and Human Services for Medicare Part D.
Step-by-step explanation:
For Medicare Part D requirement "Be likely to incur annual costs for covered Part D drugs that exceed a level specified by the Secretary", sponsors must ensure that the individual is likely to have prescription drug costs that will exceed a certain threshold set by the Secretary of Health and Human Services. This means that the individual must have a high likelihood of needing and using prescription drugs throughout the year, and that the costs associated with those drugs will be higher than the specified threshold.