When an access point sends an RTS frame, the duration field will contain an amount of time, measured in microseconds, equal to which of the following?

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

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

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

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

E.
1 RTS, 1 ACK, 1 CTS, 1 DATA, 3 SIFS