When a client station operating under EDCA sends an RTS frame and NAV protection is desired for only
the first or sole frame in the TXOP, the duration field will contain an amount of time, measured in
microseconds, equal to which of the following?

A.
1 RTS, 2 ACK, 1 DATA, 4 SIFS

B.
1 CTS, 1 ACK, 1 DATA, 3 SIFS

C.
1 RTS, 1 ACK, 1 DATA, 2 SIFS, 1 DIFS

D.
1 RTS, 1 CTS, 2 ACK , 1 DATA, 4 SIFS

E.
1 CTS, 2 ACK, 1 DATA, 2 SIFS

F.
The entire duration of the TXOP