Which of the following is not an essential prerequisite for AutoQoS to be correctly applied to an interface?

Which of the following is not an essential prerequisite for AutoQoS to be correctly applied to an interface? (Choose all that apply.)
A. The interface must be configured as a Multilink PPP interface.
B. The correct bandwidth should be configured on the interface.
C. A QoS policy must not be currently attached to the interface.
D. CEF must be enabled.
E. AutoQoS must be enabled globally before it can be enabled on the interface.
F. An IP address must be configured on the interface if its speed is equal to or less than 768 kbps.