What spread spectrum is used in the 802.11a standard?

A.
FHSS

B.
DSSS

C.
OFDM

D.
SSID

Explanation:
This standard uses a different method of modulating data onto the
necessary radio carrier signals. Where 802.11b uses DSSS, 802.11a uses OFDM and
works in the 5 GHz frequency band.