I got a 95% and this was one I had and I chose D. It's definitely not B or C because those aren't logical and are just guesses. A isn't completely logical because we know from history that having the most land doesn't guarantee victory.
Arable land was one geographical feature all three colonial regions had in common. This was important because the soil was fertile and land was plentiful. This helped the colonies become profitable and big traders among other colonies.