A Customer Wants Users to Duplicate All Their Outlook Contacts

A customer wants users to duplicate all their Outlook contacts into the one-X Portal personnel directory. How would you recommend the users do this?

A) Copy and paste all contacts from Outlook in their personal director.
B) Import the Outlook contact using a .csv format. Import the Outlook contact using a .csv format.
C) Integrate the IP Office with Outlook.
D) Add each Outlook contact individually into the personal directory.