Which the two are true about the JSTL core iteration custom tags？（）

• A、 It may iterate over arrays， collections， maps and strings.
• B、 The body of the tag may contain EL code， but not scripting code.
• C、 When looping over collections， a loop status object may be used in the tag body.
• D、 It may iterate over a map， but only the key of the mapping may be used in the tag body.
• E、 When looping over integers （for example begin1=’1’ end=’10’）， a loop status object may not be used in the tag body.