[单选题]
Which of the graphs below best de cqxfj sv)o80zcu7 -4r0an 6vqscrwam,eo2v8ur5)xfs11n v g) n aibes the change in average kinetic energy of the o xvg f8wuama251)nvesr1n ), molecules of a beaker of water as it is heated at a constant rate until it completely boils away?