Which two steps should an app builder suggest to meet these requirements?

Universal containers (uc) wants to delete data in several fields for 5000 lead records. UC export the selected record IDs and fields that need to have data deleted in a csv file .

Which two steps should an app builder suggest to meet these requirements? Choose 2 answers
A . Select the correct record type
B . Use import Wizard to update leads using the CSV file
C . Select insert null values in setting
D . Use Data Loader to update leads using the CSV file

Answer: D