The question specifies that the storage system is an ONTAP Select cluster. For software-defined storage platforms like ONTAP Select and Cloud Volumes ONTAP, SnapCenter licensing is capacity-based, not controller-based. The required license capacity is calculated by summing the sizes of the source volumes being protected. In this scenario, the total capacity is the sum of the Engineering volume (2 TB) and the Marketing volume (3 TB), which equals 5 TB. Therefore, a 5 TB SnapCenter capacity-based license is the correct requirement to protect both volumes.

A. a SnapManagerSuite controller-based license: This is incorrect. ONTAP Select is a software-defined platform and requires capacity-based licensing for SnapCenter, not controller-based licenses which are for physical FAS/AFF systems.

B. a 3 TB SnapCenter capacity-based license: This is incorrect because the total capacity to be protected is 5 TB (2 TB + 3 TB). A 3 TB license would be insufficient.

D. a SnapProtectApps controller-based license: This is incorrect. Controller-based licenses are not applicable to ONTAP Select, which mandates a capacity-based licensing model for SnapCenter data protection.

1. NetApp Technical Report 4597, "SnapCenter Software Best Practices," Page 10, Section: Licensing.

"For ONTAP Select and Cloud Volumes ONTAP, SnapCenter is licensed based on the capacity of the source volumes that are being protected." This statement directly confirms that ONTAP Select requires capacity-based licensing calculated from the source volumes.

2. NetApp SnapCenter 4.6 Installation and Setup Guide, Chapter: Licensing, Section: SnapCenter license types.

"Capacity-based licenses are required for ONTAP Select and Cloud Volumes ONTAP systems. The capacity is based on the size of the source volumes that you want to protect." This official installation guide explicitly states the licensing model for ONTAP Select.

3. NetApp ONTAP Select 9.7 Datasheet, Page 3, Section: Licensing.

The datasheet details the capacity-tiered licensing for ONTAP Select itself (Premium, Standard). It clarifies that ONTAP Select is a software-defined storage solution licensed by capacity, and associated data protection with SnapCenter follows this capacity-based model rather than the controller-based model of physical appliances.