On March 23, 1989, the chemists Stanley Pons of the University of Utah and Martin Fleischmann of the University of Southampton announced to the world that they had achieved cold fusion. That is, with a solution of salts in a simple desktop apparatus, they had caused hydrogen atoms to "fuse," or combine into helium atoms. This reaction had previously been achieved only in hydrogen-bomb blasts and in giant research projects lasting many decades and costing many billions of dollars. The two chemists claimed that they had been able to measure the energy released by the fusion process in their simple setup. The scientific world was in an uproar, because if this were really true, cold fusion would be the greatest discovery in 1000 years - a practically infinite source of cheap, safe energy. However, no matter how hard they tried, no other scientists were able to get the same results. Pons and Fleischmann had dozens of excuses, but none of them were shown to have merit. Ultimately, both scientists resigned in disgrace. What primary principle of experimental design did their experiment fail? A) replication B) Control C) Randomization