Read the following sentences from the text.
“The Earth is getting warmer for many reasons. The biggest cause is the increase of carbon dioxide in the Earth’s atmosphere…
Grasses have long roots that go deep into the soil. The roots are usually bigger than the parts of the plants that you can see above the ground! The grasses in grasslands push some of the carbon dioxide into their root systems and into the soil. So when a wildfire burns in a grassland, less carbon gets released into the air. Grasses’ long roots keep more of the carbon in the ground.”
What can you conclude about grasslands based on this information?
A. Although they can help store carbon, they are very dangerous for other reasons.
B.Wildfires will often burn up grasslands down to the roots of grass, releasing lots of carbon.
C.By keeping more carbon stored in their roots, they’re helping Earth remain cooler.
D.Scientists are trying to build grasslands across the United States to help with climate change.