which speed link should you enable the link fragmentation and interleaving feature?

To avoid unnecessary delay for high-priority traffic, on which speed link should you enable the link
fragmentation and interleaving feature?

A.
less than 768 kb/s

B.
less than 1.544 Mb/s

C.
less than 2.048 Mb/s

D.
less than 512 kb/s