Final answer:
OneAgent versions are supported for 2 years for managed customers with regular support, which allows them to receive technical support and security updates. The correct multiple-choice option is (a).
Step-by-step explanation:
For managed customers with regular support, OneAgent versions are supported for 2 years. This support timeline ensures that customers can benefit from new features, enhancements, and security updates. It's important for customers to plan their upgrade cycles accordingly to stay within the supported range of versions and maintain their eligibility for technical support and security updates. The correct multiple-choice option is (a).