Which feature accomplishes this objective?

You want your switch to disable an edge port when it receives spanning tree communications on that port.
Which feature accomplishes this objective?

A.
RSTP edge port

B.
BPDU protection

C.
root protection

D.
switch protection

Explanation:
BPDU Protection for Spanning-Tree Instance Interfaces Overview

By default, if a Bridge Protocol Data Unit (BPDU) data frame is received on a blocked interface, the system will disable the interface and stop forwarding frames out the interface until the interface is explicitly cleared.

The Spanning-Tree Protocol (STP) family is designed to break possible loops in a Layer2 bridged network. Loop prevention avoids damaging broadcast storms that can potentially render the network useless. STP processes on bridges exchange BPDUs to determine the LAN topology, decide the root bridge, stop forwarding on some ports, and so on. However, a misbehaving user application or device can interfere with the operation of the STP protocols and cause network problems.

On the MX Series routers only, you can configure BPDU protection to ignore BPDUs received on interfaces where none should be expected (for example, a LAN interface on a network edge with no other bridges present). If a BPDU is received on a blocked interface, the interface is disabled and stops forwarding frames. By default, all BPDUs are accepted and processed on all interfaces.

You can configure BPDU protection on interfaces with the following encapsulation types:

* ethernet-bridge
* ethernet-vpls
* extended-vlan-bridge
* vlan-vpls
* extended-vlan-vpls

You can configure BPDU protection on individual interfaces or on all the edge ports of the bridge.