Why Jess is not picking up hashes from the network?

Jess the hacker runs L0phtCrack’s built-in sniffer utility that grabs SMB password hashes and
stores them for offline cracking. Once cracked, these passwords can provide easy access to
whatever network resources the user account has access to. But Jess is not picking up hashes
from the network. Why?

A.
The network protocol is configured to use SMB Signing

B.
The physical network wire is on fibre optic cable

C.
The network protocol is configured to use IPSEC

D.
L0phtCrack SMB sniffing only works through Switches and not Hubs