Answer:
A. "Inserting Tasks".
Step-by-step explanation:
In Microsoft Project, each task is assigned a unique identifier called the "Task ID". The Task ID is a sequential number that is automatically assigned to each task in the project schedule. This unique identifier remains the same regardless of any changes made to the project schedule.
However, inserting tasks can affect the IDs of the existing tasks in the project schedule. When you insert a new task between two existing tasks, Microsoft Project will automatically renumber the IDs of the existing tasks to maintain the sequential order.
Moving, deleting, or indenting tasks do not affect the unique identifier of the task. Even if you move a task to a different location in the project schedule, delete a task, or indent a task to create a subtask, the unique identifier of the task remains the same. This is important for tracking and managing tasks in the project schedule.