Answer 2 is correct because the page attribute in the jsp:include action is interpreted relative to the current JSP page, that is coyote.jsp since detonate.jsp is included at translation-time of coyote.jsp. Therefore the dynamite.jsp located in the acme directory is required by coyote.jsp to display 'click'.
Answer 1 is incorrect because coyote.jsp would include the file dynamite.jsp from the same directory which would display 'boom!!!'. Answer 3 is incorrect because coyote.jsp would attempt to include dynamite.jsp from its parent directory which does not exist. Answer 4 is incorrect because jsp:include is incorrectly defined. The file atttribute is not supported by this action.
<%@include will include the code statically. We need to write something in acme/detonate.jsp. But, the code of this file is now the part of coyate.jsp directly. So, the line <jsp:include page="acme/dynamite.jsp" /> is the part of coyate.jsp not acme/detonate.jsp. Now, it is easy to see from coyate.jsp that it should be the choice 2.