Which two statements are correct about Send Logging? Choose 2 answers

A retail company does business in both the United States and Canad
a. They have a loyalty program in which a customer can enroll. The company will provide a pre-segmented customer file, per campaign, which has a "Version" data field indicating the type of email the customer is to receive.
Which two questions should be asked to determine a data/segmentation strategy?
Choose 2 answers

Northern Trail Outfitters has acquired a new company and is importing customer data to Marketing Cloud. They want to ensure commercial emails are not sent to email addresses who have previously opted-out.
Which feature should they use?

Subscribers are collected on a customer's website whose subscription database of record is Salesforce Marketing Cloud. The customer sends up to 5 emails per week based on subscriber activity.
The list is:
* Compiled in a database in the website Content Management System (CMS).
* Imported into Marketing Cloud nightly at 11 p.m.
What action should be taken if a third party is sending a message for the customer outside of the Marketing Cloud?

Northern Trail Outfitters is sending to an audience of over one million subscribers. They will use 10 different personalized fields in the email which reside in multiple data extensions. The goal is a timely email send from start to finish as it contains a limited quantity, first come-first served, special offer.
How should they accomplish this task?