In an HT WLAN in which a delayed Block Ack policy is set up, what should result when an ACK frame is not
received by the originator in response to a Basic BlockAckReq?

A.
All frames within that block must be retransmitted by the originator.

B.
The last frame within that block must be retransmitted by the originator.

C.
The BlockAckReq must be retransmitted by the originator.

D.
Nothing. No ACK is expected in response to a Basic BlockAckReq.