以下能正确定义数据类型Systemlnfo的代码是( )。

A．Type Systemlnfo DiskDrives As String*10 Memory As Long End Type
B．Type Systemlnfo DiskDrives As String*10 Memory As Long End Systemlnfo
C．Type Systemlnfo DiskDrives String*10 Memory Long End Type Systemlnfo
D．Typedef Systemlnfo DiskDrives String*10 Memory Long End Type