Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to get fair skin naturally [title] Protect yourself from the sun. [step] Most of the normal darkening and discoloration of your skin is caused by exposure to the sun's ultraviolet (uv) rays. If you're extremely concerned about having fairer skin, staying indoors will keep your skin as light as possible.

Ending1: [substeps] Wear hats and long-sleeved clothing that block the sun's rays. This means that the sun's rays will remain on your skin after you get outside. Ending2: [substeps] Ask your dermatologist to check your skin to make sure that your skin no longer absorbs the uv rays from the sun. [title] Live in a uv-rich environment. Ending3: When that's not possible, protect your skin use spf sunblock with a minimum spf of 30. [substeps] Most dermatologists agree an spf 15 is not sufficient anymore. Ending4: You will want to wear sunscreen in the early weeks of your pregnancy if you are planning to stay indoors for a long period of time. [substeps] Direct sunlight is the ultimate source of invisible uv radiation.

Answer format: ending1/ending2/ending3/ending4