What Is Estimated Time En Route (ETE)

What is estimated time en route (ETE) ?

A) the time remaining before reaching a destination using the present speed and is typically used for navigation applications
B) the time of day of an expected arrival at a certain destination and is typically used for navigation applications
C) a device that measures the acceleration (the rate of change of velocity) of an item and is used to track truck speeds or taxi cab speeds
D) a GPS technology adventure game that posts the longitude and latitude location for an item on the Internet for users to find