How is the alert() method different from prompt() and confirm()?

How is the alert() method different from prompt() and confirm()?

A.
The alert() method generates a modal dialog box, which requires user action before the next JavaScript instruction can be executed,whereas prompt() and confirm() do not.

B.
The alert() method requires only one parameter, whereas prompt() and confirm() require two parameters.

C.
The alert() method requires two parameters, whereas prompt() and confirm() require only one parameter.

D.
The prompt() and confirm() methods return a value, whereas alert() does not.