The correct option is D Antoine Lavoisier
Antoine Lavoisier revolutionised chemistry. He stated the law of conservation of mass by performing an experiment.
He placed a diamond in a closed jar containing oxygen and focused sunlight with a lens on it. He found that the diamond burns and disappears, but observes that the mass of the glass jar remained same before and after the experiment. Thus, Antoine Lavoisier concluded that the mass of a closed system remains same.