Upward Control is one of them
The important things you should examine are the presidents formal and informal powers.Formal power includes the presidents are the appointment of ambassadors and making and signing treaties with other countries. In informal the president can initiate and enact a legislative agenda, he can send out troops without declaring war.
Answer:
B. The requirement that all decisions and actions taken by the League required unanimous agreement amongst the member countries.
The could would likely find no contract that exist between Sally and Harry, when there are no written contract between both parties no one can demand the payment unless it is proven that Sally has a debt to pay to Harry because of not coming back to her house for 2 months. Harry cannot demand for $100 because he don't have a written demand.