4. all of the following were impediments to the success of the league of nations except:
a. lack of u. s. involvement in the organization due to the failure to win senate ratification of the treaty
b. the requirement that all decisions and actions taken by the league required unanimous agreement
amongst the member countries
c. the inability to counter the spread of nuclear weapons
d. the inability of the league to counter territorial aggression by rising powers like germany and
japan.