Movements of track cars must be made with a Form D line 2 or 3, except for which of the following scenarios?

The correct answer highlights a specific condition under which the standard requirement for a Form D line 2 or 3 when moving track cars does not apply. Typically, Form D is used to authorize movements in specific situations to ensure safety and proper coordination.

The scenario of a movement beyond a home signal into Advanced Block Signal (ABS) involves inherent safety protocols that may allow for this type of operation without a Form D depending on the operational guidelines in place for signal indications. This often signifies that the signal allows for the movement behavior under certain conditions, such as when the specific signal aspect indicates that it is safe to proceed.

In contrast, other scenarios like emergencies, multiple track car movements, or authorization from another dispatcher would generally require formal documentation such as a Form D to ensure all movements are logged, controlled, and within safety regulations. This is essential to maintain clarity and safety in dispatching operations, especially in more complex or high-risk situations. Thus, the nature of the signal and the operational context allows for certain exceptions to the rule concerning movements with track cars.