单项选择题

阅读程序
SUB P(B( ) AS INTEGER)
FOR I=1 TO 4
B(I) =2*I
NEXT I
END SUB
PRIVATE SUB COMMAND1_CLICK( )
DIM A( 1 TO 4) AS INTEGER
A(1)=5
A(2) =6
A(3) =7
A(4) =8
P A( )
FOR I = 1 TO 4
MSGBOX A(I)
NEXT I
END SUB
运行上面的程序，单击命令按钮COMMAND1后，消息框4次输出的内容分别是( )。

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