Multi-choice problem: Continue writing the next sentence in this paragraph:

How to stamp concrete with elite crete system's concrete solutions
Pressure wash the surface with a 3200 psi pressure washer.
The goal here is to remove any foreign particles in the pores of the substrate and also to remove any loose concrete.
Mix 1 part muriatic acid with 8 parts of clean water and put this in a watering jug or pump up sprayer.

Options:
1). After loosening the concrete from the surface use a leaf blower to clean off any remaining water in the pores of the concrete. Allow the concrete to dry after the copper compound has dried.;
2). It is important to use a plastic sprayer as the muriatic acid will corrode metal sprayers. Spray the acid and water mixture on the surface.;
3). Add 600 grit sand to a waterproof bucket or wheelbarrow and pump up water to the depth needed for filling. Pour the agreed on amount of cement mix into the thrown away concrete job.;
4). Fill it to the max with the recommended sealant. Put rubber band on the side of the sprayer to prevent any overflow.;
2).