Which statements are true about BFD? (Select two.)

Which statements are true about BFD? (Select two.)
A . BFD provides very fast link error detection but uses more resources than routing protocol fast hellos.
B . BFD can be configured only over Ethernet links.
C . BFD not only detects link failures but also speeds up routing event propagation between neighbors by using fast hellos.
D . BFD is resource efficient, as some function can be supported directly in the hardware.
E . BFD is routing protocol independent and can work with all modern routing protocols.
F . BFD can be enabled either globally or per interface.

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Answer: DE