What IEEE standard was Wired Equivalent Privacy first introduced?

What IEEE standard was Wired Equivalent Privacy first introduced?

• 802.1x
• 801.1a
• 802
• 802.11 

EXPLANATION

IEEE introduced WEP in the 802.11 standard but updated it in the 802.1x.

SOURCE

https://www.giac.org/paper/gsec/4214/wireless-security-ieee-80211-standards/106760