Refer to the exhibit.

Your company designed a network to allow server VLANs to span all access switches in a data center In the design, Layer 3 VLAN interfaces and HSRP are configured on the aggregation switches Which two features improve STP stability within the network design? (Choose two.)

• A.BPDU guard on access ports
• B.root guard on the aggregation switch downlinks toward access switches
• C.root guard on access ports
• D.edge port on access ports
• E.BPDU guard on the aggregation switch downlinks toward access switches
• F.access switch pairs explicitly determined to be root and backup root bridges

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