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