answer

While researching a topic, a student has taken the following notes: Nuclear pulse propulsion (a rocket powered by small nuclear explosions) was first proposed by physicist Stanislaw Ulamhad in 1946. Project Orion was a study that aimed to assess the viability of a spaceship powered by nuclear pulse propulsion. The project began in 1958 and was led by physicists Ted Taylor and Freeman Dyson. Non-nuclear tests were conducted with models, but the project was abandoned before any spacecraft using nuclear pulse propulsion could be built. The Partial Nuclear Test Ban Treaty of 1963 is generally credited with ending the project. The student wants to specify Project Orion's timeline. Which choice most effectively uses relevant information from the notes to accomplish this goal? Choose 1 answer: (4) The Partial Nuclear Test Ban Treaty of 1943 brought Project Orion to an abrupt end. Physicist Stanislaw Ulam first proposed nuclear pulse propulsion in 1946, and in 1958, Project Orion was born. (c) Project Orion launched in 1958, but was effectively shut down just five years later with the passage of the Partial Nuclear Test Ban treaty in 1963. (D) Led by physicists Ted Taylor and Freeman Dyson, Project Orion lasted from 1946 to 1943, when the Partial Test Ban Treaty was signed