A Process Definition Document, for a New Process to Open

A Process Definition Document, for a new process to open ISA accounts, specifies that the value "2008 Cash ISA" is to be entered into the Product Selection field of the following screen: The Product Selection field is a drop down menu with the following options available: According to Best Practice, which of the following design options are correct for populating the Product Selection field with the value 2008 Cash ISA:

A) The Product Selection value should be hard coded as 2008 Cash ISA in the stage that will populate the field.
B) A text data item, with an initial value of 2008 Cash ISA should be configured. This data item should be used as the input value to the stage that will populate the Product Selection field.
C) An input parameter should be configured in the start stage allowing the calling process to determine what value to be populated into the Product Selection number field
D) All of the above