A hacker searches in Google for filetype:pcf to find Cisco VPN config files. Those files may contain connectivity passwords that can be decoded with which of the following?

CUPP (Common User Passwords Profiler) is a targeted wordlist generator for brute-force campaigns and has no capability to decode Cisco PCF password obfuscation.

Nessus is a vulnerability and configuration scanner used to identify network weaknesses, not a tool for decoding or extracting stored credentials.

Cain and Abel includes a dedicated Cisco VPN client password decoder that reverses the simple XOR-based encoding Cisco uses to store group passwords in PCF (Profile Configuration File) files. Because this is obfuscation rather than true encryption, the decoded password is immediately usable without brute-force cracking.

John the Ripper Pro is a hash-cracking tool that uses brute-force and dictionary attacks against password hashes, and is not designed to reverse Cisco's PCF obfuscation scheme.