Please choose the correct ending to complete the given sentence: Health: [header] How to improve your memory using meditation [title] Start today. [step] You may be surprised that you don't need to practice meditation for that long to start seeing the effects. One scientific study examined how a group of students responded to meditation.

Ending1: With just two weeks of meditation practice (10 minutes a day, plus 4 45-minute classes a week), the students significantly improved their gre scores (a standardized test given to students trying to get into graduate school). [substeps] In fact, some studies show as little as four days of meditation can improve your attention span and memory. Ending2: A learning experience can be an emotional experience, as does the idea of having another person's voice in your head. So to help keep you grounded, it's a good idea to start exercising regularly to increase stamina. Ending3: The school has a wide range of potential disciplines and often has individual tutor from all the subjects that they taught, so there are a huge variety of options. Begin in the morning and maybe give yourself a quick break in the afternoon if it can be done before school starts. Ending4: Scientists believe that meditation works such that one student who had to work eight hours of days in a row learned the benefits of meditation before being trained. In addition, once someone has learned meditation, they must work eight hours a day for seven months.

Answer format: ending1/ending2/ending3/ending4