Which data model should be used to create a Group?

Northern Trail Outfitters (NTO) has been sending emails for about 10 years. A new marketing manager noticed their deliverabihty continually decreased over the last year. NTO wants to grow their existing subscriber base and increase ROI on email marketing by improving engagement with subscribers.
Which three strategies would improve their email deliverabihty?
Choose 3 answers

A marketer wants to run an Account Send Summary report. Which option can be configured when running this report? (Choose 3)

A company has one million subscribers. The company has a Master data extension that contains information about its subscribers, such as Email Address, Physical Mailing Address, Phone Number, and Loyalty information. There are 40 fields in the data extension. The data is used for multiple daily email campaigns.
How should the data be updated?

Northern Trait Outfitters is using a Smart Capture form on a CloudPage to capture contest registrations in a data extension. Corporate has requested a nightly file with all registrants in this data extension be sent daily from Marketing Cloud to an external SFTP.
Which automation configuration should be used to achieve this?