The 'Label' is the primary, human-readable identifier for a campaign in Adobe Campaign Classic. It is a mandatory field that must be populated to create and save a new campaign instance. This allows users and the system to uniquely identify and reference the campaign within the marketing plan. While other attributes are important for execution, the label is fundamental to the object's creation.

B. Start date: A campaign can be created in a 'Planning' or 'Draft' state without an immediate start date. Scheduling is often configured after the initial setup and content are finalized.

C. Plan: A campaign can exist independently without being assigned to a 'Plan' or 'Program'. This linkage is for organizational and budgetary hierarchy and is not required for creation.

D. Channel: The communication channel (e.g., email, SMS) is determined by the delivery activities configured within the campaign's workflow, not as a mandatory top-level property of the campaign itself.

1. Adobe Experience League - Campaign Classic v7 Documentation: In the section on creating a marketing campaign

the first step after selecting a template is to define the campaign's properties. The documentation states

"Enter a label for the campaign." This

along with the 'Internal name'

serves as the campaign's primary identifier

which is a prerequisite for creating any new entry in the system.

Source: Adobe Campaign Classic v7 Documentation

"Get started with marketing campaigns > Campaign properties"

Section: "General tab".

2. Adobe Experience League - Campaign Classic v7 Documentation: The data model for campaigns (nms:operation) requires a primary key and a label for identification in the user interface and database. While the internal name (internalName) is also mandatory

it is often automatically derived from the label (label) upon creation

making the label the essential user-provided field.

Source: Adobe Campaign Classic v7 Documentation

"Data model description > nms:operation".