The Himalayas mountain range
D is the correct answer.
The British Army was the far superior force. The British Navy was the far superior force. Britain was also a manufacturing powerhouse.
But the British Army was fighting to preserve something while the Revolutionaries were fighting for their rights and to start something new.
This question is delightfully biased but it is true that the Americans, by and large, were more committed to the fight.
An entire suit of field armor (that is, armor for battle) usually weighs between 45 and 55 lbs. (20 to 25 kg), with the helmet weighing between 4 and 8 lbs. (2 to 4 kg)—less than the full equipment of a fireman with oxygen gear, or what most modern soldiers have carried into battle since the nineteenth century.