Which two are true？ （）
- A Tag files can only be accessed using a tagdir attribute.
- B The sort.jsp page translates successfully and invokes the tag defined by beta.tag.
- C The sort.jsp page produces a translation error because a taglib directive must always have a uri attribute.
- D Tag files can only be placed in /WEB-INF/tags， and NOT in any subdirectories of /WEB-INF/tags.
- E The tagdir attribute in line 2 can be replaced by a uri attribute if a TLD referring to beta.tag is created and added to the web application.