What are 2 ways to improve deliverability?

A 15-person management team wants to review test emails built in Email Studio prior to live deployment based on content that is personalized for them, but is clearly noted as a test email. What is the safest, most effective way for a marketer to accomplish this task without compromising the email content?

A marketer for Northern Trail Outfitters (NTO) needs to dynamically update the sender name and email address based on the sales representative associated with the account. The data is stored in two separate data extensions.
Which two tools should the marketer use? Choose 2 answers

A marketer created dynamic content for an upcoming campaign that renders unique content based on subscriber attributes. The marketer would like to preview how each email will render for a given list of subscribers.
How should the marketer proceed?

A marketer needs to ensure that customers on a list want to be email subscribers.
Additionally, the marketer wants of to minimize the number of invalid email addresses on the list, and add a level of security when using Web Collect functionality. What is the optimal way to accomplish this task?