This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to finish wood
Sand down the wood.
Wood will have flaws like scratches and dents. Whether marks have come from the machines at the mills, or it has become scratched or gouged during handling, or from wear and tear.

OPTIONS:
(1). Before applying any stain, finishing, or paint, you need to sand down the wood to allow you apply to new materials and prevent the flaws from being highlighted. If the flaws in the wood aren't sanded away, the finish that is applied will only highlight and expose any marks or scratches.
(2). Sanding down the wood will ease these types of imperfections away and make it look like a whole new piece of wood. Choose a dust-free compound such as finish compound.
(3). Use a sanding pad to remove dust and dirt. For bigger scratches and dents, wipe the wood down with a clean cloth, then use a hammer and begin nailing an all-purpose wood trim through each crack and cranny.
(4). Start to sand down, brushing in very light back and forth across the surface of the wood in a grid pattern and using 80 or 120 grit sandpaper to smooth out the edges. Don't sand too hard-sanding too hard could peel the bar away from the wood.
The answer is:
(1).