Which one of the following statements is a recommendation from ServiceNow about Update Sets?

Which one of the following statements is a recommendation from ServiceNow about Update Sets?
A . Avoid using the Default Update set as an Update Set for moving customizations from instance to instance
B . Before moving customizations from instance to instance with Update Sets, ensure that both instances are different versions
C . Use the Baseline Update Set to store the contents of items after they are changed the first time
D . Once an Update Set is closed as “Complete”, change it back to “In Progress” until it is applied to another instance

Answer: A