Which phrase describes this transformation?

A consultant built an Einstein Analytics dashboard for a company. The company then requested an enhancement to thedashboard and provided additional data that needs to be displayed. As a result, the consultant decides to "augment" the dataflow.

Which phrase describes this transformation?
A . Add data based on the right-side grain
B . Join data similar to an SQL statement
C . Add data as a lookup relationship (left side is the lowest grain)
D . Join data based on a many-to-many relationship

Answer: C

Explanation:

https://trailhead.salesforce.com/en/content/learn/modules/wave_enable_data_integration_b asics/wave_extract_salesforce_data

https://help.salesforce.com/articleView?id=bi_integrate_augment_transformation.htm&type =5