Which of the following dumped hashes would be most useful to an attacker?

Betty is a standard user account with limited privileges; compromising her hash provides minimal access to the system or network.

Aarti is also a standard user account and offers the same limited privilege level, making her hash low-value compared to an administrative credential.

The SYSTEM account is a local service identity used by the OS kernel; it does not have a password in the traditional sense and cannot be used to authenticate over the network the way a user account hash can.

The built-in Administrator account (RID 500) has full local administrative privileges and is never locked out by default policy, making its hash ideal for pass-the-hash or offline cracking attacks. An attacker who obtains this hash can authenticate to any local service or perform lateral movement across machines that share the same local Administrator password, a common misconfiguration. This makes it far more operationally valuable than standard user hashes.