Explanation
According to the Alibaba Cloud Academy, a cloud disk snapshot is a point-in-time backup of a cloud disk.
You can use snapshots to back up data, create images, or restore data. The operations that you can do on a cloud disk snapshot are snapshot creation, snapshot deletion, snapshot rollback, and snapshot sharing.
Snapshot duplicate and snapshot download are not the operations that you can do on a cloud disk snapshot.
Therefore, the options A and C are the correct answers. References: Snapshot Overview - Alibaba Cloud Documentation Center, ACA Cloud Computing Exam Preparation Course - Alibaba Cloud, Module 3: Cloud Computing Storage, Lesson 2: Snapshot, Slide 2