you want to implement an authentication method so that different password attacks, like dictionary attacks, brute force attacks, etc., will not result in unauthorized access to the web application hosted by your enterprise. You want to do this by not using any specialized hardware or making any changes to the user's activity during the authentication process. Which of the following methods should you apply?

a$.$ You should implement facial recognition.

b$.$ You should implement keystroke dynamics.

c$.$ You should implement iris scanning.

d$.$ You should implement fingerprint authentication.