Final answer:
The best techniques to meet the requirements are a magic link sent to an email address and SMS with OTP sent to a mobile number.
Step-by-step explanation:
The best technique to meet the requirements of the insurance company is a combination of Magic link sent to an email address and SMS with OTP sent to a mobile number. Sending a magic link to an email address would allow customers to reset their password without the need for secret questions, and it would minimize the management overhead by eliminating the need for passwords. Additionally, sending an SMS with a one-time password to a mobile number provides an extra layer of security for authentication, enhancing customer engagement and reducing the need for manual password resets.