Context: Figure: Buffalo Gap National Grassland.
Buffalo Gap National Grassland is a prairie grassland ecosystem in southwestern South Dakota.
Which better describes the Buffalo Gap National Grassland ecosystem?
A. It has hot summers. It also has soil that is rich in nutrients.
B. It has a small amount of rain. It also has dry, thin soil.
From the given choices, select the correct answer and reply with the letter of the chosen option.

A