A towboat has the same draft as the barges it is pushing ahead. If the distance from the stern of the towboat to the head of the tow is 800 feet, where is the approximate location of the pivot point of the unit?

A
At the head of the tow
B
250 feet from the head of the tow
C
400 feet from the head of the tow
D
600 feet from the head of the tow
E