Write the next sentence in the following story.

How to add nitrogen to compost
Add fresh grass clippings to the compost.
Collect the grass clippings left after you mow your lawn. Add the clippings in thin layers to the compost so that it doesn't clump up into big chunks.

Select from: 1). This ensures you have enough for about eight pallets of compost. Raise your compost intake to 80 lb (475 kg).; 2). Make sure that your grass clippings are fresh because dried grass clippings will add carbon to the compost. Add leafy plant clippings to the compost.; 3). Weed to keep it from piling up in the compost. The better you treat your lawn, the less weed you will see.; 4). Adding fresh grass clippings is great because they add little to no nitrogen. Before you heat the hay, pick up a scrap of straw or leaf material and toss it in the compost.;. The answer should be
2).