<human>: Which of the following solutions is better for the following goal:
how to mix cement

OPTIONS:
- Make a crater in the pile of cement. Add a small amount of water. Adjust the mixture as necessary. Pour the mixed cement immediately into your project's area
- Make a crater in the pile of sand. Add a small amount of glycerine  Adjust the mixture as necessary. Pour the mixed cement immediately into your project's area
<bot>: Make a crater in the pile of cement. Add a small amount of water. Adjust the mixture as necessary. Pour the mixed cement immediately into your project's area