The wired equivalent privacy standard had what significant disadvantage?

Wired equivalent privacy standard has the significant disadvantages as, it is uses the static encryption keys. Wired equivalent privacy are the security and the privacy protocol which are used for designing the wireless local area network. And the static encryption key are used to set up the router for encrypting the packet in the device. The main disadvantage is that it enables the MAC address and it is easily detectable by the hackers.  

i want to say d but i could be wrong however it is organized if that could happen..

hope it could