[单选题]
Which of the graphs below best describes the change in ave2 z dld2j(vg21asmpj0sza .g/y6tmke8wyh -0 rage ku:j,tji;ol263o3 z5ln rm w aoinetic energy of the:nwzm il3r j63,o;t aoo2 5jlu molecules of a beaker of water as it is heated at a constant rate until it completely boils away?