Final answer:
Hootsuite Mobile aids teams with functionalities like Assignments and Approvals which allow for social media posts to be assigned and reviewed. The Content Library is also useful but is not paired with Campaigns in the context of this question. Search is a feature but not mentioned in the context of team functionalities within Hootsuite Mobile's options given.
Step-by-step explanation:
Hootsuite Mobile is designed to enhance collaboration and efficiency for teams managing social media platforms. The correct answer to which functionalities are useful for teams is A) Assignments and Approvals. This feature allows team members to assign specific social media posts to others for action or follow-up, and for content to be reviewed and approved before it is posted. This ensures that the content is consistent with the brand's voice and complies with its social media policy.
Content Library is another feature offered by Hootsuite which helps in storing and managing pre-approved content and assets in a central location, making it easier for the team to access and use approved content for their social media campaigns. This can be included as part of the functionalities that support Campaigns but is not directly paired with it in Hootsuite Mobile's described features for the given options.
Lastly, Search and Assignments functionality may provide the capability to search through social media posts and assign them to different team members for engagement or follow up. However, in the context of the given options, it's not paired alongside Approvals or Campaigns, which are the functionalities more relevant to team collaboration within Hootsuite Mobile.