Monica Wants to Implement More Security Around the Login Function

Monica wants to implement more security around the login function that her company's website uses to allow customers to interact with the organization. One of the tasks on her to-do list is to prevent brute force attacks. Which of the following might help Monica achieve this goal?

A) Analyze the geolocation where the user is logging in.
B) Analyze the frequency of attempted logins.
C) Analyze the source IP address of the user attempting to log in and ensure that it matches the normal IP address the user logs in from.
D) Analyze the type of device the user is attempting to log in from.