What must a Practitioner determine before adding a Delivery activity to a campaign workflow?

What is the maximum number of Campaign application servers a single client can connect to at one time?

From which screen on the client should the Business Practitioner approve the targeting of an email delivery in an email campaign?

Workflow A runs before Workflow B.
Workflow A populates a staging table that workflow B uses to load each day. Workflow B frequency fails because Workflow A is still creating the writing to the table. What is the best way for a campaign business practitioner to solve this error?

A campaign business practitioner is monitoring a delivery during its analysis. The campaign business practitioner notes that the audit has indicated two items with a warning. What happen with the delivery because of the warning?