Which of the following is the BEST reason to use password complexity requirements?

While complex passwords might indirectly reduce simple reuse by being harder to remember, their primary technical purpose is to make a single password stronger against attacks, not explicitly prevent reuse across multiple services.

Password complexity requirements ensure that passwords contain a mix of character types (uppercase, lowercase, numbers, symbols) and meet a minimum length, making them significantly more resistant to brute-force and dictionary attacks, which directly strengthens access control.

Legal requirements may mandate strong passwords, but the technical reason behind implementing complexity is the security benefit of stronger access control, not merely compliance.

Meeting customer requirements is a business objective; the technical reason for implementing password complexity is to achieve stronger access control and improve security.