Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to grow black girls hair [title] Wash your hair every 1 to 2 weeks with a moisturizing shampoo and conditioner. [step] If you wash your hair more often then that, your hair will end up too dry and brittle. This can lead to breakage.

Ending1: [substeps] If you need to wash your hair more often, consider using just conditioner. This is known a " co-washing " and is safe to use regularly, because it doesn't strip hair of its moisture. Ending2: Use a volumizing shampoo once a week. If you can color your hair once a month, wash your hair once a month so that it becomes less frizzy and brittle. Ending3: [title] Get your hair waxed at least every 2 to 4 weeks for better shine and lifespan. [step] Waxing can result in splitting ends over time. Ending4: [title] Always repeat your hair washing routine at least once per week. [step] Take regular breaks and wash your hair three times per week.

Answer format: ending1/ending2/ending3/ending4