How do you create a new CSV legacy picklist? Please choose the correct answer.

How do you create a new CSV legacy picklist? Please choose the correct answer.
A . Enter the new picklist values into the Optionld column.
B . Import the picklist file using the Picklist Mapping tool
C . Export all picklists and add a new picklist ID and new picklist values to the file.
D . Export the data format and add a new picklist ID and new picklist values to the file.

Answer: D