Which design benefit of PortF ast is true?

Which design benefit of PortF ast is true?
A . PortFast does not generate a spanning tree topology change hen a station on a port is connected or disconnected
B . PortFast disables spanning tree on the port, which puts the port into the forwarding state immediately after it is connected
C . PortFast allows small, unmanaged switches to be plugged into ports of access switches without risking switch loops
D . PortFast detects one-way communications on the physical port, which prevents switch loops
E . PortFast prevents switch loops that are caused by a unidirectional point to point link condition on Rapid PVST+ and MST
F . PortFast prevents switched traffic from traversing suboptimal paths on the network

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Answer: A