Correct:
--> The string will remain unchanged
--> If the string is printed to a browser, the angular brackets will not be visible and it will be interpreted as HTML
This question tests nothing about your knowledge of HTML encoding-and everything about your ability to properly interpret code. The $s function is left unaltered by the call to htmlentities(), which returns the modified string so that it can be assigned to $ss. Therefore, Answers B and D are correct. If you're wondering whether this is an unfair "trick" question, do keep in mind that, often, the ability to find and resolve bugs revolves around discovering little mistakes like this one.