How many month of data can a developer query from the tracking data views (_Sent, _Open, _Click)?

A developer wants to add an image to Content Builder via the API and retrieve the image's published URL. Which method should the developer use?

Northern Trail Outfitters (NTO) wants to prevent competitors from receiving a coupon email. They also want to capture email addresses of competitors who are included in the targeted audience.
Which feature could NTO use to prevent the coupon from being sent and report the email addresses skipped?

A developer wants a link to be dynamic based on subscriber attributes. Rather than create numerous links, the developer uses AMPscript to set the link's value as a variable. The variable will be used within the <a> tag. What should the developer do within the <a> tag to ensure clicks are tracked for the variable? Choose 2

New subscribers at Northern Trail Outfitters (NTO) are added to a data extension. NTO would like to send these subscribers a welcome series with Journey Builder.
What would allow the data extension to be selected for journey entry'