Please choose the correct ending to complete the given sentence: Health: [header] How to use a glucometer [title] Obtain a glucometer and test strips. [step] You can go to any drugstore and buy a blood sugar testing kit. Most kits contain lancets (testing needles), a lancing device, testing strips, and a meter to read the results.

Ending1: [substeps] If the kit does not contain a glucometer, however, then you can just buy a test strip and a meter. The meter will serve as a gauge and can measure the exact amounts of lancets in red blood cells. Ending2: [substeps] Many insurance companies will pay for your meter and test strips if you obtain a prescription from your doctor. [title] Read the materials and directions that come with your meter. Ending3: Test strips only work when you have a positive lethdown (" reading of ") percentage. [substeps] Measure your lethdown percentage using a 2-meter meter. Ending4: You can also use strips like test casters. Most needles are sized like a bulb and measure your blood sugar at various locations along the seam between the rubber tip of the needle and the strip.

Answer format: ending1/ending2/ending3/ending4