The 1968 assassination of Robert Kennedy robbed anti-war Americans of their leading candidate. Option A is correct.
On June 5, 1968, presidential candidate Robert F. Kennedy was murdered shortly after midnight at the Ambassador Hotel in Los Angeles.
Robert Francis "Bobby" Kennedy was an American politician and lawyer who became the 64th United States Attorney General serving from January 1961 to September 1964, and as a U.S. Senator from New York from January 1965 until he was assassinated in June 1968. He was a prominent member of the Democratic Party and turnt into an icon of modern American liberalism.