Please choose the correct ending to complete the given sentence: Education and Communications: [header] How to create a potato battery [title] Gather the necessary materials. [step] To make a single potato battery you will need a potato, a galvanized nail, a copper coin, two alligator clip leads with clips on both ends, and a voltmeter. [substeps] Galvanized nails are standard nails that have a zinc coating.

Ending1: They are a good fit for your battery since they do not rub between your hands. Galvanized nails attach directly to conductive metal that can withstand high temperatures. Ending2: They can be purchased at any hardware or home improvement store. Use a fresh potato as the experiment depends upon the juices inside the potato. Ending3: Galvanized nails are a standard procedure used to crimp copper pennies into sockets. Galvanized nails can be bought at hardware and electronics stores. Ending4: If you can't find galvanized nails online, you can purchase a nail kit at your local hardware store. [title] Wire a rust resistant wire with fat-soluble dha.

Answer format: ending1/ending2/ending3/ending4