Please choose the correct ending to complete the given sentence: Holidays and Traditions: [header] How to care for a living christmas tree [title] Keep your tree outside until a few days before christmas. [step] Living christmas trees should not be kept indoors for more than 7-10 days at most. [title] Acclimate your tree to indoor temperatures.

Ending1: [step] Place it in a nursery setting in a protected area with good air circulation. This is an area prone to frost and cold temperatures. Ending2: [step] This will make your tree less susceptible to pests and insects such as mold or mildew. [title] Unplug your tree once a day. Ending3: [step] Slowly bring your tree indoors so as not to shock an outdoor tree by exposing it to warm indoor temperatures. The warm temperature will encourage tree growth which is to be avoided. Ending4: [step] If you're away from home for long enough for a tree to grow, it's generally best to leave it outside for " protection. " that means keeping it out of direct sunlight.

Answer format: ending1/ending2/ending3/ending4