Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to keep cooked broccoli bright green [title] Be careful not to steam green vegetables. [step] Green vegetables contain chlorophyll, when chlorophyll is cooked, it produces carbon dioxide. Since you have to cover the vegetables to steam them, the chlorophyll turns a drab, grayish color.

Ending1: Do not steam green vegetables if you live in a climate with conditions affected by cold. [title] Cut your broccoli into pieces if you have any greens on your salads and pack them into a steaming bowl. Ending2: [title] Let the broccoli stand in the steam room for thirty minutes. [step] The broccoli should start emitting a green color in approximately one week. Ending3: You can prevent this by boiling the greens, in salted water. [title] Use a large amount of water, then add salt. Ending4: This will affect how bright and impressive your broccoli will be. [title] Make your own broccoli sauce.

Answer format: ending1/ending2/ending3/ending4