Final answer:
The subject of this question is business and it is relevant for a college level of study. Call Em All is a communication tool used to send blast messages to a team.
Step-by-step explanation:
The subject of this question falls under business and it is relevant for a college level of study. Call Em All is a tool that falls under the category of communication. It allows the user to send a blast message to the entire station team, which can be useful for communicating important information or updates. However, the options provided in the question are not correct. Call Em All is not a tool for inventory control or any of the other options. It primarily focuses on facilitating effective communication within a team or organization.