To verify if a Sender Authentication Package (SAP) has been set up, check:
* Tracked Links Prefix: If all links in emails sent start with click.email.nto.com, it indicates that a SAP is configured for link rewriting to include the company's domain.
* CloudPages URL: Personalized URLs for CloudPages that use the domain cloud.email.nto.com also suggest that SAP is set up, ensuring that all customer-facing URLs reflect the organization's branding.

Explanation
Each user should have a one-to-one relationship between Marketing Cloud and Sales Cloud to send emails from Sales Cloud, and the Create Email feature should be enabled on the user profile to allow users to create emails in Sales Cloud. B is incorrect because deep linking is not related to creating and sending emails from Sales Cloud. D is incorrect because Sales Cloud users do not need to have System Administrator Profile and a Role at the top of the Role Hierarchy to send emails from Sales Cloud.

Salesforce Sidekick
For Northern Trail Outfitters' scenario, where they need to send one of three different emails randomly to new subscribers within a journey, the most suitable activity to accomplish this with the fewest steps would be using:
B: Engagement Split
However, the correct answer for randomly distributing different email versions in a journey is not listed among the options provided under typical usage. Normally, the Engagement Split is used to branch the journey based on how subscribers interact with emails (e.g., opens or clicks).
The ideal solution for NTO's need to send one of several different emails at random would be the "Random Split" activity in Journey Builder, which is not listed in the options. Since the closest option provided that would allow for varying paths (though not randomly) is the Engagement Split, it could be considered, but it does not fulfill the requirement as described.
Therefore, based on the given options and the actual functionality needed:
* There seems to be a misunderstanding in the options provided. Normally, a "Random Split" would be used in this case.
If we must choose from the available options, none directly fulfill the requirement of randomly sending different email versions with the fewest activities possible.