Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to use charcoal scrubs [title] Mix a charcoal face mask. [step] You can make a great charcoal face mask to freshen up your skin with a few ingredients. While research is lacking in the effectiveness of charcoal face masks, many have found them to be helpful.

Ending1: [substeps] Dark colored, dark brown, green, blue, black, and white masks are rich in concentrated charcoal. Black masks can help brighten up some people's eyes, and black masks have been shown to tone bone and other important muscle groups. Ending2: The following are some common masks available to people with certain skin conditions : [substeps] For oily skin: mix one part methylene acid, one part charcoal, and eight parts water. To make a charcoal face mask, grind one part charcoal, one part water, and 1 part catnip. Ending3: In addition to helping remove dead skin cells, charcoal masks have been shown to help help remove the main oil in the pore, which is what we call " dry-picking. " [substeps] Combine a jar of charcoal scrub with water and a dollop of the charcoal. Ending4: You will need activated charcoal powder, rosewater, aloe vera gel, and a couple of drops of tea tree oil. [substeps] Mix the charcoal powder, rose water, and aloe vera gel in equal amounts.

Answer format: ending1/ending2/ending3/ending4