Answer:
C. Julius and Ethel Rosenberg
Step-by-step explanation:
Julius Rosenberg was arrested on suspicion of espionage on June 17, 1950, and accused of heading a spy ring that passed top-secret information concerning the atomic bomb to the Soviet Union. Ethel was arrested two months later. The Rosenbergs were implicated by David Greenglass, Ethel’s younger brother and a former army sergeant and machinist at Los Alamos, the secret atomic bomb lab in New Mexico. Greenglass, who himself had confessed to providing nuclear secrets to the Soviets through an intermediary, testified against his sister and brother-in-law in court. He later served 10 years in prison.