The correct answer would be option first - It is a traditional nautical term.
Explanation:
In early 17th century sailors used to measure the speed of the ship by the device called a common log. This device was a coil of rope with several knots placed uniformally to it, attached to a slice of pie like shaped piece of wood. It was allowed to flow freely in the sea for specific time and pulled back after particular time.
Thus, the correct answer would be option first It is a traditional nautical term.
