What is the benefit of configuring PortFast on an interface?

What is the benefit of configuring PortFast on an interface?
A . After the cable is connected, the interface uses the fastest speed setting available for that cable type
B . The frames entering the interface are marked with higher priority and then processed faster by a switch
C . After the cable is connected, the interface is available faster to send and receive user data
D . Real-time voice and video frames entering the interface are processed faster

Answer: C