Why should a campaign business practitioner add a compliment to a split?

In an Adobe Campaign Classic workflow, the 'Split' activity is used to create subsets from a target population. When the "Generate complement" option is enabled, the activity creates an additional outbound transition. This transition contains all the records from the inbound population that did not meet the criteria for any of the other defined subsets. The primary purpose of this complement is to isolate and enable the analysis or further processing of these remaining records.

A. To analyze the order of the split selection: The order of evaluation for the split subsets is defined in the activity's configuration, not analyzed via the complement.
C. To analyze rejected records: The term "rejected records" is ambiguous. The complement specifically contains records not selected for a subset, which is more accurately described as the "remaining" population.
D. To analyze content selected in the split: The Split activity segments a population; it does not select or analyze creative content. Content is handled by subsequent activities, such as a Delivery.

1. Adobe Experience League - Campaign Classic v7 Documentation

"Split" activity:

In the section describing the configuration of the Split activity

it states: "The Generate complement option lets you compute the remainder of the population in a last transition. The complement contains the population that doesn't meet the criteria of the subsets defined in the activity." This directly supports that the complement is for analyzing the remaining records. (Source: Adobe Experience League

Campaign Classic v7 Documentation

Workflow activities > Targeting activities > Split).