In a Clause 18 (HR-DSSS) frame’s PLCP header, what does the 16-bit length field indicate?

A.
The size in octets of the MPDU being transferred in the PPDU

B.
The length of time in kilo microseconds it will take to transmit the PSDU

C.
The length of time in microseconds it will take to transmit the MPDU

D.
The size in bits of the entire PPDU frame