Answer is C
The issue with the US and USSR was the stockpile of nuclear weapons.
They agreed to remove them from Cuba
The answer would be (D) the Social Security Act
The last time the rivalry determined a Big Ten Conference champion was in 1962 when #3 Wisconsin defeated #5 Minnesota for a berth to the 1963 Rose Bowl. Wisconsin won 14 straight meetings against Minnesota, from 2004 to 2017, before the Gophers beat the Badgers in their 2018 matchup.