Which of the following are TRUE in the context of authentication and authorisation in web applications? [2] Select one or more: a. Authentication is often used interchangeably with access control or client privilege. b. Authentication is the act of validating that users are who they claim to be. c. Passwords are the most common authorisation factor d. Authorization is the process of giving the user permission to access a specific resource or function e. Authorization is the act of validating that users are who they claim to be