What Is the Man-In-The-Middle Threat for Wireless LANs

What is the man-in-the-middle threat for wireless LANs?

A) The attacker impersonates an authorized user and gains certain unauthorized privileges to the wireless network.
B) The attacker passively monitors wireless networks for data,including authentication credentials.
C) The attacker steals or makes unauthorized use of a service.
D) The attacker actively intercepts communications between wireless clients and access points to obtain authentication credentials and data.