Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to deal with a police polygraph test [title] Understand the various parts of the polygraph equipment. [step] This will help you appreciate what the machine is and is not capable of. When you sit down to take the exam, you will be fitted with a blood pressure cuff, a pneumograph, and two galvanometers.

Ending1: These devices are small plastic tubes that let a white light into the bones and stop some of the blood flow to the body. [substeps] The four galvanometers can be located in either front or rear of the machine, with protective features like lenses on or behind them. Ending2: You will also be wearing gloves with their base stationed on your left hand. Give the required information to the officer who checks all the materials for the examination. Ending3: [substeps] A galvanometer is a finger plate that is placed on your fingers and that measures how much you perspire as a result of stress. A blood pressure cuff keeps track of your blood pressure. Ending4: You will also be given a blank card that lists the auditory information that came through the machine during the exam. Good readings depend on the station you are in and the questions you will be asked.

Answer format: ending1/ending2/ending3/ending4