The highlights of 'Ultra broadband & High Integration' pertain to Huawei's advanced transmission solutions, such as the OptiXtrans DC908, designed for DCI scenarios. According to HCSA-Sales-Transmission & Access materials:

Hybrid photoelectric integration (B): This feature integrates optical and electrical components, reducing complexity and improving efficiency, a hallmark of Huawei's high-integration designs.

9.6T/2U (C): The DC908 delivers an industry-leading capacity of 9.6 terabits per second in a compact 2U form factor, emphasizing ultra-broadband capability and space efficiency.

100G~800Gbit@per X (D): This refers to the flexible, scalable bandwidth per port (ranging from 100G to 800G), a key feature for ultra-broadband applications in DCI.

Hardware redundancy (A): While important for reliability, it is not specifically highlighted under 'Ultra broadband & High Integration' but rather under stability or resilience features.

Thus, B, C, and D are the verified highlights.