In the Second Punic War, Hannibal attempted a unique strategy to invade Rome when he _________________________.
A. filled a wooden horse with 37 of his best men and left it at the outer gate of the city
B. marched his troops and 37 elephants through the Alps
C. attacked the island of Sicily in the middle of the night
D. used female spies to infiltrate the capitol and sneaked the soldiers inside the gates