Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to kill aspergillus niger [title] Use alcohol to disinfect surfaces. [step] A 70% alcohol solution is an effective way to kill aspergillus. [substeps] Alcohol is an effective fungicide because it is able to penetrate the cell walls and spores of aspergillus niger, killing it in the process.

Ending1: To use alcohol, apply a liberal amount of a 70% solution to all visible areas of fungus, and let it sit for ten minutes. After 10 minutes of contact time with alcohol, you can wipe the treated area clean and dry it with a clean rag, cloth, or mop. Ending2: Although there are no scientific studies showing that alcohol kills aspergillus niger, aspergillus niger is considered a potentially lethal insect. It is extremely dangerous to use beer or other liquor if you live in an area where aspergillus niger is likely to be prevalent. Ending3: Professional cleaners will be able to supply you with a 60% alcohol solution or at least 50% 100 %. However, this ratio is not sustainable unless you live in a place where high ozone levels are high and air pollution can cause poor air quality. Ending4: It is also not 100% effective at killing aspergillus niger. Alcohol increases the growth rate of aspergillus niger, eliminating the effectiveness of alcohol.

Answer format: ending1/ending2/ending3/ending4