To answer this question, you need to understand the purpose and functionality of cookies in web development.
Option A) Track a user's e-mail - This option is incorrect because cookies are not primarily used to track a user's email. They are primarily used to track user preferences and maintain state in web applications.
Option B) Add statefulness to the originally stateless HTTP - This option is correct. Cookies are used to add statefulness to the originally stateless HTTP protocol. By storing small pieces of data on the user's computer, cookies allow websites to remember user information and maintain session state.
Option C) Disclose a user's identity - This option is incorrect. Cookies do not disclose a user's identity. They can store user information, but it is up to the website to determine what information is stored in the cookie.
Option D) Add history information to the originally stateless HTTP - This option is incorrect. Cookies do not add history information to the originally stateless HTTP protocol. They are primarily used for maintaining state and remembering user preferences.
The correct answer is B. Cookies are used to add statefulness to the originally stateless HTTP protocol.