Please choose the correct ending to complete the given sentence: Work World: [header] How to become a pool boy [title] Learn the services necessary for a pool boy job. [step] Take a class or read a manual addressing pool maintenance, debris removal and ph levels. [title] Get certified, if necessary.

Ending1: [step] Be sure to include your basic training. Most pools house up to 30 pool boys, so it's a good idea to include the membership requirement and campus experience. Ending2: [step] Certification is not enough to be a pool boy. Typically, a pool boy must have at least a degree in pool science before earning a pool boy license. Ending3: [step] In order to join a pool boy job, you'll need to demonstrate one of the following qualifications: good athletic stature. About 40 percent of pool girls demonstrate athletic ability. Ending4: [step] Find out if you need a license or certification in your area. Some states require you to obtain a license to clean public pools.

Answer format: ending1/ending2/ending3/ending4