This is a test of commonsense with single/multi-choices. Complete the next sentence:

A man exercise on a rowing machine pulling a handle and moving forward and backward. then

Pick your answer from: I. , he moves a rod to the side and pushes the rod to bend.; II. , the man squats to lift the bar with his right hand, then he lift the bar with his left hand on the flat surface and stops.; III. , the man increases the resistance of the machine and continue exercising.; IV. , the man hold the more handle as is increases the weight, then the man pushes the handle dumb on the next line of curling cars.;
The answer is:
III.