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单项选择题 You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You create a class that contains the following code segment. (Line numbers are included for reference only.)  01 Public Function GetCachedProducts( _ ByVal conn As SqlConnection) As Object  02  03 If Cache("products") Is Nothing Then  04 Dim cmd As New SqlCommand("SELECT * FROM Products", conn)  05 conn.Open（　）  06 Cache.Insert("products", GetData(cmd))  07 conn.Close（　）  08 End If  09 Return Cache("products")  10 End Function  11  12 Public Function GetData(ByVal prodCmd As SqlCommand) As Object  13 14 End Function  Each time a Web form has to access a list of products, the GetCachedProducts method is called to provide this list from the Cache object.  You need to ensure that the list of products is always available in the Cache object. Which code segment should you insert at line 13?（）

A、A

B、B

C、C

D、D

  • D

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