Please choose the correct ending to complete the given sentence: Youth: [header] How to keep teens from drinking at a party where alcohol is served [title] Determine whether or not it is necessary to serve alcohol at the party. [step] Depending on the type of party or the people there, serving alcohol may not the best choice. [title] Try to gauge how many teens will be at the party, and the likelihood of underage drinking.

Ending1: [step] A majority of parties should have at least 50 teens at the party. If there will be more, you should make note of the number on the bottle. Ending2: [step] If adults outnumber children or teens, the likelihood of drinking will go down because of more supervision. However, be aware this does not guarantee anything, because children and teens can often evade adult supervision. Ending3: [step] Adult parties will be more enjoyable, but you should determine how well you know the people that will be attending. [substeps] When a teen is 16, the alcohol control program pays very close attention to anyone underage. Ending4: [step] If it is a formal party, you may want to serve more teenagers. If it is a casual party, you will probably want to serve more students, meaning you will serve less kids at a more social gathering.

Answer format: ending1/ending2/ending3/ending4