Which three content blocks do you need to create using AMPscript to enable personalization?

A marketing team wants to narrow down a customer population of several billion subscribers based on e commerce order detail's and rapidly explore the data to find appropriate segments
,what tool should the marketing team use

A file is received daily from a data provider to the account FTP. This file needs to be imported into the Marketing Cloud as soon as it arrives. The arrival time of this file varies by several hours day to day. What tool should be used to accomplish this?

NTO is looking at using Journey Builder rather than Automation Studio to send emails. What are the three benefits of using Journey Builder? Choose 3 answers

A marketer at Northern Trail Outfitters (NTO) has been tasked with growing its email subscriber audience.
Which three best practices should the marketer keep in mind while trying to acquire new email subscribers?
(Choose three.)