Question: When considering database migration, at what point should a complete backup of the source database be made? a . ) After transferring the data to

When considering database migration, at what point should a complete backup of the source database be made?
a.)
After transferring the data to the new database server
b.)
As the very first step of the process
c.)
Immediately before purging the data from the source system
d.)
After cleaning the data

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