有如下一段程序： SET TALK OFF AY="Hello World!" BY="X" CY=ASC(BY)+1 DY=30 EY=CHR(DY*2+5)+CHR(CY) EY=&EY ?"&EY." SET TALK ON RETURN 执行该程序后，屏幕显示的结果为

A．AY

B．BY

C．Hello World!

D．程序出错