Answer:
I believe the answer is humid subtropical.
The telegraph because it faster than riding on a pony across the us
The affect of surprise was that the natives Americans enemy wouldn't have time to prepare so the losses/casualties for the enemy would be heavy,also using the element of surprise would also most likely scare enemy soldiers, and they would be distracted and confused as well.
A.
a popular cattle drive route in the years after the Civil War" is the correct response, since this trail was used primary by ranches moving from Texas up north.