How should the analyst configure the processing rule so that any hits from affiliate are added to the Affiliate marketing channel?

An analyst needs to configure an Affiliate marketing channel within the Marketing Channel Processing Rules. Traffic from this channel uses the “source” and “campaign_name” query parameters. The “source” query parameter is used by other marketing channels. Traffic from the Affiliate marketing channel this query parameter with a value that starts with “aff”. Affiliate traffic may NOT have a defined value for “campaign name”.

How should the analyst configure the processing rule so that any hits from affiliate are added to the Affiliate marketing channel?
A . Hits where the “source” query parameter starts with “aff” and the “campaign_name” exists
B . Hits where the “source” query parameter starts with “aff”
C . Hits where the “source” and “campaign_name” query parameters exist
D . Hits where the ‘campaign_name” query parameter starts with “aff”

Answer: B