Matching $($resolving variations in data such as these for example: $$Home Depot, Ottumwa, IA$,$Home Depot #$207,$ IA$,$Home Depot Store #$207,$ Ottumwa$)$ and Synchronization $($resolving the measurement unit such as in this example: $$ten cases of $20$ HDTVs each shipped to location A$$ and $3$ HDTVs shipped to location B$)$ are part of which phase of the ETL process?

Question $1$Select one:

a$.$

Aggregation

b$.$

Extraction

c$.$

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d$.$

Transformation