Final answer:
The best practice for assigning roles to Email Specialists at NTO is to adjust existing roles to include necessary permissions, specifically option C, checking "Allow" automation permissions for the Content Creator Role and assigning it to the Business Units.
Step-by-step explanation:
When creating and assigning roles for NTO, following best practices means considering the need for broad versus specific permissions for users. As NTO prefers not to use custom roles unless necessary, and the Email Specialist role encompasses a range of duties that involve creating content, testing, sending emails, defining activities for Automation Studio, and creating automations, the ideal approach would be:
Option C Check Allow automation permissions for the Content Creator Role and assign it to the Business Units. This option streamlines the role assignment process and minimizes the complexity of creating and managing custom roles, adhering to the company's preference. By adjusting the permissions of an existing role, the Email Specialists can effectively carry out their responsibilities across multiple business units without the added burden of custom roles management.