What is an accurate description of the Adobe Campaign Hierarchy?

A Campaign developer is configuring an exclusion that takes two queries as input.
Query 1: Select customers with email address
Query 2: Select customers who do not want to be contacted
Customers who do not wish to be contacted must be removed. In a test run of the exclusion, the workflow raises the following error:
"You must define the main set for exclusion 'Remove Suppressions'." How should the campaign developer solve this issue?

When connecting to an Adobe Campaign server using the Client Console, an operator gets the following error:
'HTTP code 500: The IP address via which you are accessing the server is not accepted. Connection refused.' How should the Developer fix this issue?

An attribute called model_name is added to an existing schema, customerModel, using the following code:
<attribute label="Model Name" length="255" name="model_name" type="string"/> The XML for the new columns is parsed successfully and saved to the schema definition.
The end user tries to view the data using configure list... by adding the new attribute to the output columns.
The following database error is thrown. "Invalid column name 'sModel_name'" What is the reason for this error?

A customer has a custom CRM System that holds all profiles used for Marketing Campaigns. The customer wants to have the data available in Adobe Campaign Classic and use it for Marketing Campaigns. The CRM System is relying on HTTP communication to communicate with other systems.
In which two ways can the CRM System push profiles to Adobe Campaign Classic? (Choose 2)