Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to test blood to make sure it's real [title] Gather the necessary materials. [step] In this experiment, you will be testing for the presence of catalase using hydrogen peroxide. Catalase is an enzyme in your cells that converts hydrogen peroxide into pure oxygen and water, causing a foaming action to occur.

Ending1: You will need scientific equipment to get your experiment done. Still, you will need to gather some materials and equipment: a small, clean tube of hydrogen peroxide and some strips of test foam. Ending2: You will need : [substeps] A microscope (black power) and a glass. The microscope will have metal parts that emit a chemical called volzaiac which releases oxygen into your urine. Ending3: To use this test, you will need hydrogen peroxide, a microscope slide, a cotton swab, a small eyedropper, gloves, and the blood sample to test. [substeps] Standard 3% hydrogen peroxide found at the store works fine. Ending4: [substeps] You will need: a 12 oz container large enough to hold your lab materials, a test surface, and a cup. [title] Dilute hydrogen peroxide with red wine vinegar.

Answer format: ending1/ending2/ending3/ending4