This is in Differential Calculus. This is only multiple choice. Provide necessary solution. In case the answer is not in the choices, write the correct answer. Thank you and Godbless.

17. A man on a pier holds a rope attached to a boat at a level 12 feet below the man's hands. If 20 feet of rope are out and the boat is drifting away at the rate of 2 ft/s, find the rate at which the rope is passing the man's hands. A) 2fv/s 1.6 fu/s B) 1.4 ft/s D) 1.8 fu/s