以下自定义数据类型的语句中，正确的是( )。

A) Type student
ID As String * 20
name As String * 10
age As Integer
End student
B) Type student
ID As String * 20
name As String * 10
age As Integer
End Type
C) Type student
ID As String
name As String
age As Integer
End student
D) Type
ID As String * 20
name As String * 10
age As Integer
End Type student