Please choose the correct ending to complete the given sentence: Health: [header] How to get up when you want with only a few hours of sleep [title] Do not press the snooze button. [step] Wake up as soon as your alarm goes off. Reaching for the snooze button might seem like a great way to get an extra few minutes of sleep; however, hitting snooze actually results in your feeling more exhausted upon waking.

Ending1: Getting up when your alarm goes off can cause further sleepiness later in the day. If you want to be able to wake up quickly, you can also keep your phone away from you during sleep. Ending2: Sometimes, you may encounter an alert light immediately, which can be dramatically triggering you. [substeps] A light sleep has been shown to raise the level of blood rushing to your body in response to stress. Ending3: Each time you don't feel sleepy, push out of bed and open your bedroom door. [substeps] If you're waking up with no type of alarm, hitting the snooze button might seem like a good choice. Ending4: [substeps] If you're waking up to an alarm clock, you'll often end up jerked awake in the middle of rem sleep. This is the deepest stage of your sleep cycle.

Answer format: ending1/ending2/ending3/ending4