Need help to clear the doubts in couple of sample questions.. Adobe Campaign Classic

Hi, Please check below.

How is recurring delivery similar to a continuous delivery?

1. Both deliveries append record to the delivery log
2. Both deliveries can be sent multiple times
3. Both deliveries can be modified in the delivery step ( I think)
4. Both deliveries create new delivery logs

What are two reasons to include the email address when importing a list of contacts? (Choose two.)

1. to meet legal requirements
2. to update the primary key field
3. to send a confirmation email
4. to populate the reconciliation key