Please choose the correct ending to complete the given sentence: Food and Entertaining: [header] How to steam milk [title] Use fresh, cold milk. [step] Cold milk produces the best results. [title] Keep to the right temperature for steaming.

Ending1: [step] This is usually 65-70ºc/149ºf-158ºf for each milk type. Any temperature higher than this is too hot and will overcook the milk. Ending2: [step] You can use any temperature you would like, as long as your steam milk is at least at 100 degree fahrenheit (60 degrees celsius). Check the temperature every 15 minutes for a good handle on steam rate and for delivery times. Ending3: [title] Add oxygen if you don't have access to the recommended amount of oxygen--you can find this in the beverage you're steamed using the above example. [step] When milk is rich in natural glycolic acid, it's sufficient to maximize the amount of oxygen required in your steam. Ending4: [step] Using the right temperature also ensures that the milk won't end up too hot. Take the proper precautions : [substeps] Do not heat milk while it's still cold to avoid burning yourself if possible.

Answer format: ending1/ending2/ending3/ending4