Which of the following are not key NEs (Network Elements) in Huawei EasyBranch solution?

The Huawei EasyBranch solution, per HCSA-Sales-IP Network V6.0, integrates key network elements for branch connectivity: the S5731-L-RU switch (A) for plug-and-play access, the AirEngine 5762-10 AP (C) for Wi-Fi 6 coverage, and the NetEngine AR5710-S (D) as a hyper-converged gateway. The AR6000V (B), while a router in Huawei’s portfolio, is not a key NE in EasyBranch, which focuses on specific AR models like the AR5710-S. Thus, B is the correct answer.References: HCSA-Sales-IP Network V6.0, EasyBranch Solution Components.