How can you notify suppliers to register on the Ariba Network?

How can you notify suppliers to register on the Ariba Network?
A . Bulk upload the suppliers users through enablement workbook
B. Send an email to the supplier users via the message board
C. Generate password for supplier user in Ariba
D. Invite supplier users through sourcing event
E. Send invitations to the supplier users via SAP Ariba Discovery

Answer: A,C,D