The correct answer is: C. Henry Bacquerel.
Henry Becquerel was a French physicist who discovered natural radioactivity in 1896. He was studying the phosphorescence of uranium salts when he noticed that they emitted a type of radiation that could pass through paper and even blackened photographic plates. This discovery led to the study of radioactivity and the development of nuclear physics.
Marie Curie was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize, the first person and only woman to win the Nobel Prize twice, and the only person to win the Nobel Prize in two different scientific fields. She was born Maria Salomea SkÅodowska in Warsaw, in what was then the Kingdom of Poland, part of the Russian Empire. She studied at Warsaw’s clandestine Floating University and began her practical scientific training in Warsaw. In 1891, aged 24, she followed her older sister BronisÅawa to study in Paris, where she earned her higher degrees and conducted her subsequent scientific work. She shared the 1903 Nobel Prize in Physics with her husband Pierre Curie and physicist Henri Becquerel. She won the 1911 Nobel Prize in Chemistry.
Ernest Rutherford, 1st Baron Rutherford of Nelson, OM, FRS was a New Zealand physicist who played a leading role in the development of nuclear physics. He was born in Nelson, New Zealand, and educated at Canterbury College, Christchurch, and the Cavendish Laboratory in Cambridge, England. He is best known for his work on radioactivity, which he discovered in 1896. He also discovered the proton and the neutron, and developed the theory of alpha decay.
Enrico Fermi was an Italian and naturalized-American physicist who developed the theory of beta decay, and the nuclear chain reaction, for which he won the 1938 Nobel Prize in Physics. He also played a major role in the Manhattan Project, the Allied effort to develop a functional atomic weapon during World War II.