Which migration strategies should be opt?

ABC telecom is a large telecommunication operates with 75 million assets across its customer and business customers. The company cloud to take advantage of customer 360 capabilities. There are slight operational differences between the various regions where it sells services, some regions may have different readiness timelines.

Which migration strategies should be opt?
A . Migrate Assets in chunks, portioning by geographical region and account type and then prioritize the migration based on regional timelines.
B . Do not migrate legacy assets and leverage external objects within salesforce to access them
C . Coordinate migration readiness across regions and execute migration all at once to ensure consistency
D . Migrate assets in chunks, portioning by geographical region and account type and then prioritize high value business accounts.

Answer: A