Please choose the correct ending to complete the given sentence: Health: [header] How to make and use an onion poultice for congestion [title] Purchase two medium-sized onions. [step] Red onions typically contain the most quercetin. However, all onions have some of the antioxidant and have demonstrated expectorant properties for those with congestion.

Ending1: Red onions produce a greater amount of quercetin, but have more potential to worsen cold symptoms. You may need to substitute for the onions, but two medium onions should allow you to make a poultice without the need for additional onions. Ending2: When you learn to cook the onions, remember to do so on a baking sheet instead of on the stove. [substeps] As before, you can purchase two medium-sized onions at an allergist's store. Ending3: These additional ingredients have been shown to help normalize the odor of ginger root or ginkgo roots. [substeps] Cut 1 large onion in half and put 1 unpeeled onion on a large baking sheet. Ending4: Therefore, two red onions may be preferable, but any two medium-sized onions will do. [substeps] Onions are known to contain quercetin (an antioxidant) and phytochemicals, both of which may help the body by breaking up the mucus in the chest and head.

Answer format: ending1/ending2/ending3/ending4