An IS auditor is performing a network security review of a telecom company that provides Internet connection services to shopping malls for their wireless customers. The company uses Wireless Transport Layer Security (WTLS) and Secure Sockets Layer (SSL) technology for protecting their customer's payment information. The IS auditor should be MOST concerned if a hacker: 
A、compromises the Wireless Application Protocol (WAP) gateway. 
B、installs a sniffing program in front of the server. 
C、steals a customer's PDA. 
D、listens to the wireless transmission.