如果存在如下过程：
Private Function Fun( a( ) As Integer)
Dim First As Integer, Last As Integer, i As Integer
First = LBound(a)
Last=UBound (a)
Max = a(First)
For i=First To Last
If a(i)＞Max Then Max =a(i)
Next
Fun=Max
End Function
在窗体上添加一个命令按钮，然后编写如下事件过程：
Private Sub Command1_Click()
ReDim m(1 To 4) As Integer
m(1) =20: m(2) =30: m(3) =50: m(4) =100
c =Fun(m)
Print c
End Sub
单击命令按钮，其输出结果为 【10】 。

主动脉瓣二叶瓣畸形易并发（）

A.心律失常

B.二尖瓣脱垂

C.感染性心内膜炎

D.风心病

E.心肌炎