If you disable PortFast on switch ports that are connected to a Cisco ASA and globally turn on BPDU filtering, what is the effect on the switch ports?

If you disable PortFast on switch ports that are connected to a Cisco ASA and globally turn on BPDU filtering, what is the effect on the switch ports?
A . The switch ports are prevented from going into an err-disable state if a BPDU is received.
B . The switch ports are prevented from going into an err-disable state if a BPDU is sent.
C . The switch ports are prevented from going into an err-disable state if a BPDU is received and sent.
D . The switch ports are prevented from forming a trunk.

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Answer: C