Are you sure you want to leave?

Your test is still in progress. If you leave this page or go back now, all your attempt wil not be saved.

A Formula 1 racing driver loses up to 3 kg of body weight every race through fluid loss (sweating). Tremendous forces imparted on their bodies, and the hot and humid conditions during a race caused this dramatic drop in weight.

If this is true, which of the below sentences must be true?