Multi-select problem: How does the next paragraph end?

How to paint concrete
Clean the concrete surface with soap and warm water, removing any old paint.
First, sweep away any surface leaves, debris, and dirt. Then remove any existing paint or gunk using a power washer or scraper and wire brush.

Choose your answer from: a). Scrub away any dirt, grime, or gunk that is stuck to the concrete. You do not have to worry about stains, however, if they are set in and not some sort of object stuck onto the surface.. b). Find an area that won't get wet for a long time. Concrete is prone to clearing easily, but a wet area makes cleanup much easier.. c). Spray the concrete with wd-40. Hold the spray bottle about 4 inches (10.2 cm) away from the concrete surface.. d). You can also use protective eyeglass so if paint becomes stuck on the surface you can wash it off with a wet rag or sponge. Remove any old paint or gunk..
a).