“America may boast that she has accomplished what no power before her ever did, contending with Britain-Captured two of their celebrated Generals
and each an Army of thousands of veteran Troops to support them.”
--Abigail Adams, letter to John Adams, December 9, 1781

To which of the following is Abigail Adams referring in this excerpt?
A The American victory at the Battle of Yorktown

B The negotiation of the Treaty of Paris by American diplomats
C The bravery of American soldiers at Valley Forge

D The arrival of French aid after the Battle of Saratoga