Which of the following is a mechanism used by the Multimedia Extensions (WME) standard to avoid contentions in a particular traffic category?

Which of the following is a mechanism used by the Multimedia Extensions (WME) standard to avoid contentions in a particular traffic category?

A.
Sliding Window Protocol

B.
Contention Window (CW)

C.
Auto-Rate Fallback

D.
Maximum Segment Size (MSS)