The option that will best fit for organization's needs is honeypot.
Honeypot is a system for computer security mechanism to detect, deflect, or counteract the attackers or unauthorized use of internal system including internal fraud, malpractice, and snooping. Honeypot will be placed in current network.
Honeynet is a decoy network which is can be actual network or simulated to trap attackers or unauthorized use of internal system.
Exploitation framework is to running intrusive scanning for uses the vulnerabilities of identified by a scanner. Metasploit is one of exploit framework.
You question is incomplete, but most probably your full question was
Management has reason to believe that someone internal to the organization is committing fraud. In order to confirm their suspicion, and to collect evidence, they need to set up a system to capture the events taking place. evaluate which option will best fit the organization's needs.
Option answer is
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