Q7 Single choice Mark for later Which statement is true about <param> elements in action definitions? A Just one <params> element is allowed inside each <params> element. B Only <params> elements with required="true" can be used by precondition and execution classes. C <params> element names within <params> elements do not need to be unique. D <params> elements, containing required="true", must be passed to the action execution classes. Correct answer