Code Snippet for Printing Exception Error Message

D.

Option A (<%= exception.message %>) is not a valid Java Server Pages (JSP) expression syntax. The correct syntax for outputting a value in JSP using scriptlets is <%= expression %>. In this case, the exception object is not defined in the current scope, so it would result in an error.

Option B (<c:out value="${requestScope["javax.servlet.error.exception]}"/>) is the correct way to print the exception error message as part of the page output. This option uses the JSP Standard Tag Library (JSTL) c:outtag to output the value of thejavax.servlet.error.exceptionattribute from therequestscope. This attribute contains a reference to theThrowableobject that caused the error. Thec:out' tag is used to HTML-escape the output, which is important for security reasons.

Option C (<% exception.getMessage(); %>) is a valid JSP scriptlet that calls the getMessage() method on the exception object, but it does not output the result to the page. In order to output the message to the page, you would need to use the JSP expression syntax (<%= %>).

Option D (<% System.out.println(e.getMessage()) %>) is a JSP scriptlet that outputs the exception message to the server console using System.out.println(), but it does not print the message as part of the page output. Printing the exception message to the console is useful for debugging purposes, but it does not provide any feedback to the user.