Choose the sentence from this excerpt that best supports the claim that Klaus Fuchs should not have been allowed to work on the Manhattan Project.
Japan was an enemy during World War II; it had continued to fight after its ally, Germany, had surrendered in May. When the first bomb did not convince Japan to surrender, the United States dropped a second bomb three days later, on August 9. World War II ended shortly after that.
After the war, Fuchs returned to England. In late 1948, the Federal Bureau of Investigation (FBI) turned over some shocking evidence to British intelligence: Fuchs had been spying for the Soviet Union. The evidence specifically involved the passing of atomic bomb secrets.
The sentence that best supports the claim that Klaus Fuchs should not have been allowed to work on the Manhattan Project is: “Fuchs had been spying for the Soviet Union.”
Explanation: This sentence highlights Fuchs’s disloyalty and lack of trustworthiness, which directly undermines the security and integrity of a project as critical as the Manhattan Project. His actions suggest that he posed a national security risk, indicating that he should not have had access to sensitive information related to nuclear weapons.