What must be done to accomplish this task effciently?

An organization is migrating its current guest network to Cisco ISE and has 1000 guest users in the current database There are no resources to enter this information into the Cisco ISE database manually .

What must be done to accomplish this task effciently?
A . Use a CSV file to import the guest accounts
B . Use SOL to link me existing database to Ctsco ISE
C . Use a JSON fie to automate the migration of guest accounts
D . Use an XML file to change the existing format to match that of Cisco ISE

Answer: C