Which act covers private$-$sector employees over age $21$ enrolled in noncontributory $(100$ percent employer$-$paid$)$ retirement plans who have one year's service?

Which act covers private$-$sector employees over age $21$ enrolled in noncontributory $(100$ percent employer$-$paid$)$ retirement plans who have one year's service?

the Americans with Disabilities Act $($ADA$)$

the Employee Retirement Income Security Act $($ERISA

the Consolidated Omnibus Budget Reconciliation Act $($COBRA$)$

the Health Insurance Portability and Accountability Act $($HIPAA$)$