Which of the following is TRUE with regards to the Frame relay protocol in this scenario?

You are employed as a network designer at ABC.com.
You are in the process of designing a wide area network (WAN) network strategy for ABC.com.
You have been informed that the strategy should make use of the Frame relay protocol.
Which of the following is TRUE with regards to the Frame relay protocol in this scenario?

A.
Frame relay operates at the physical layer of the OSI model only.

B.
Frame relay transmissions are broken into 128-byte packets.

C.
Frame relay allows for high-speed data to be handled competently over the WAN.

D.
Frame relay operates at the physical, data link, and network layers.