Which describes Baron Friedrich von Steuben?
a. a former Prussian captain who turned a disorderly Continental Army into a skilled fighting force
b. a young German officer on Washington's staff who captured a British fort during the battle at Yorktown
c. the Frenchman who became a general on Washington's staff and his lifelong friend
d. the Hessian commander of British troops in the South who lost the battle at Yorktown