An HT STA does not receive an ACK for a first-attempt data frame that it transmitted. Assuming this STA is
not using BlockAcks in this case, what happens to the HT STA’s EDCA contention window?

A.
The slot time within the contention window decreases by 50%.

B.
It varies because the backoff algorithm is random.

C.
The contention window approximately doubles in size.

D.
The contention window is not affected by failed Data frame delivery.E. The contention window is immediately closed, and the frame is retransmitted.