老年人口增加可使（）。

A.出生率迅速下降

B.死亡率增加

C.婴儿死亡率下降

D.生育率下降

E.总和生育率下降

在工程中的标准模块中定义了如下数据类型：
Type fruit
orange As Integer
apple As Integer
End Type
在窗体上有—命令按钮Command1，要求当单击命令按钮时在C:\根目录下的顺序文件myfrtac.txt 中写入一条记录，下列能够完成改操作的事件过程是______ 。

A．Private Sub Command1_Click()
Dim myfrt As fruit
myfrt. orange = 5
myfrt. apple = 10
Open “c:\myfrta. txt” For Output As #1
Print #1, myfrt. orange; myfrt. apple
Close #1
End Sub

B．Private Sub Command1_Click()
Dim myfrt As fruit
myfrt. orange= 5
myfrt. apple= 10
Open “c:\myfrtac. txt”For Input As #1
Print #1, myfrt, orange; myfrt. apple
Close #1
End Sub

C．Private Sub Command1_Click()
Dim myfrt As fruit
myfrt. orange= 5
myfrt. apple = 10
Open “c:\myfrtac. txt” For As #1
Print #1, myfrt. orange; myfrt. apple
Close #1
End Sub

D．Private Sub Command1_Click()
Dim myfrt As fruit
myfrt. orange = 5
myfrt. apple= 10
Open “c:\myfrtac..txt” For Output As #1
Print myfrt. orange; myfrt. apple
Close #1
End Sub