the answer is C. You're welcome
Grant fefused many of Lee's surrender. Grant didnt want to give Lee and terms. Grant said Unconditional surrender (non-negotiable (cause Grant didnt want Lee to ask for money or other things if he surrenders)) or war. This became a very famous speech and gave grant the nickname Ulysses "Unconditional" Grant. Lee eventually agreed to unconditional surrender.
Some people disagree with using agent orange during the Vietnam war because the agent was dangerous and had adverse effects on both the enemy and the American troops. Agent orange was a powerful chemical used for defoliation during the Vietnam war to eliminate forest cover. It was later discovered that the chemical caused serious health issues for the service men, their families as well as the enemy. Health issues experienced include: birth defects, tumors, rashes, cancer, etc.
In WWII the americans helped form the UN which is an international governing system that sets world laws on war. After developing this group of nations tjey formed together to destroy the german military.