Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to keep blue crabs alive [title] Buy a cooler. [step] Buy a regular sized cooler from your local depot or sporting goods store. If you are planning to store more than five crabs, it is recommended that you buy a larger cooler.

Ending1: [title] Purchase a shallow tank for the crabs to fit into. [step] Rather than paying the upfront costs for a cooler, buy a cooler that is insulated and low-temperature. Ending2: Purchase one that is at least one arm's length for every 15 crabs you plan to have. [substeps] Large coolers are a good option for many people who are crab friendly. Ending3: If you are not planning to store more crabs, you'll need a separate cooler for each crab. [substeps] If you're not able to find a cooler at your local hardware store, you can purchase your own. Ending4: This way you will not need to stack the crabs on top of each other. [substeps] Alternatively, you can use a wooden bushel basket to store the crabs.

Answer format: ending1/ending2/ending3/ending4